' . __( 'Warning! PHP Safe Mode Enabled!', 'wp-super-cache' ) . '

' . __( 'You may experience problems running this plugin because SAFE MODE is enabled.', 'wp-super-cache' ) . '
'; if( !ini_get( 'safe_mode_gid' ) ) { echo __( 'Your server is set up to check the owner of PHP scripts before allowing them to read and write files.', 'wp-super-cache' ) . '
'; printf( __( 'You or an administrator may be able to make it work by changing the group owner of the plugin scripts to match that of the web server user. The group owner of the %s/cache/ directory must also be changed. See the safe mode manual page for further details.', 'wp-super-cache' ), WP_CONTENT_DIR ); } else { _e( 'You or an administrator must disable this. See the safe mode manual page for further details. This cannot be disabled in a .htaccess file unfortunately. It must be done in the php.ini config file.', 'wp-super-cache' ); } echo '

' . __( 'Mobile rewrite rules detected', 'wp-super-cache' ) . "

" . __( 'For best performance you should enable "Mobile device support" or delete the mobile rewrite rules in your .htaccess. Look for the 2 lines with the text "2.0\ MMP|240x320" and delete those.', 'wp-super-cache' ) . "

" . __( 'This will have no affect on ordinary users but mobile users will see uncached pages.', 'wp-super-cache' ) . "

" . __( 'Mod Rewrite rules updated!', 'wp-super-cache' ) . "

" . sprintf( __( '%s.htaccess has been updated with the necessary mod_rewrite rules. Please verify they are correct. They should look like this:', 'wp-super-cache' ), $home_path ) . "

" . __( 'Mod Rewrite rules must be updated!', 'wp-super-cache' ) . "

" . sprintf( __( 'The plugin could not update %1$s.htaccess file: %2$s.
The new rules go above the regular WordPress rules as shown in the code below:', 'wp-super-cache' ), $home_path, "" . $update_mod_rewrite_rules_error . "" ) . "

" . esc_html( $rules ) . "

Click the following link to see the lines added to that file. If you have upgraded the plugin, make sure these rules match.', 'wp-super-cache' ), $home_path ); ?>

# BEGIN WPSuperCache\n" . esc_html( $rules ) . "# END WPSuperCache

" . sprintf( __( 'Rules must be added to %s too:', 'wp-super-cache' ), WP_CONTENT_DIR . "/cache/.htaccess" ) . "

# BEGIN supercache\n" . esc_html( $gziprules ) . "# END supercache

' . __( 'Fix Configuration', 'wp-super-cache' ) . '

' . __( 'Do not cache the following page types. See the Conditional Tags documentation for a complete discussion on each type.', 'wp-super-cache' ) . '

" );
		fclose( $fp );
		wp_cache_setting( 'wp_cache_debug_log', $wp_cache_debug_log );
		wp_cache_setting( 'wp_cache_debug_username', $wp_cache_debug_username );
	}
	return array( 'wp_cache_debug_log' => $wp_cache_debug_log, 'wp_cache_debug_username' => $wp_cache_debug_username );
}

function wpsc_update_debug_settings() {
	global $wp_super_cache_debug, $wp_cache_debug_log, $wp_cache_debug_ip, $cache_path, $valid_nonce, $wp_cache_config_file, $wp_super_cache_comments;
	global $wp_super_cache_front_page_check, $wp_super_cache_front_page_clear, $wp_super_cache_front_page_text, $wp_super_cache_front_page_notification, $wp_super_cache_advanced_debug;
	global $wp_cache_debug_username;

	if ( false == $valid_nonce ) {
		return array (
			'wp_super_cache_debug' => $wp_super_cache_debug,
			'wp_cache_debug_log' => $wp_cache_debug_log,
			'wp_cache_debug_ip' => $wp_cache_debug_ip,
			'wp_super_cache_comments' => $wp_super_cache_comments,
			'wp_super_cache_front_page_check' => $wp_super_cache_front_page_check,
			'wp_super_cache_front_page_clear' => $wp_super_cache_front_page_clear,
			'wp_super_cache_front_page_text' => $wp_super_cache_front_page_text,
			'wp_super_cache_front_page_notification' => $wp_super_cache_front_page_notification,
			'wp_super_cache_advanced_debug' => $wp_super_cache_advanced_debug,
			'wp_cache_debug_username' => $wp_cache_debug_username,
		);
	}

	if ( isset( $_POST[ 'wpsc_delete_log' ] ) && $wp_cache_debug_log != '' ) {
		@unlink( $cache_path . $wp_cache_debug_log );
		extract( wpsc_create_debug_log( $wp_cache_debug_log, $wp_cache_debug_username ) ); // $wp_cache_debug_log, $wp_cache_debug_username
	} elseif ( isset( $_POST[ 'wp_super_cache_debug' ] ) ) {
		if ( ! isset( $wp_cache_debug_log ) || $wp_cache_debug_log == '' ) {
			extract( wpsc_create_debug_log() ); // $wp_cache_debug_log, $wp_cache_debug_username
		} elseif ( ! file_exists( $cache_path . $wp_cache_debug_log ) ) { // make sure debug log exists before toggling debugging
			extract( wpsc_create_debug_log( $wp_cache_debug_log, $wp_cache_debug_username ) ); // $wp_cache_debug_log, $wp_cache_debug_username 
		}
		$wp_super_cache_debug = (int) $_POST[ 'wp_super_cache_debug' ];
		wp_cache_setting( 'wp_super_cache_debug', $wp_super_cache_debug );
	}

	if ( isset( $_POST[ 'wp_cache_debug' ] ) ) {
		wp_cache_setting( 'wp_cache_debug_username', $wp_cache_debug_username );
		wp_cache_setting( 'wp_cache_debug_log', $wp_cache_debug_log );
		$wp_super_cache_comments = isset( $_POST[ 'wp_super_cache_comments' ] ) ? 1 : 0;
		wp_cache_setting( 'wp_super_cache_comments', $wp_super_cache_comments );
		$wp_cache_debug_ip = esc_html( $_POST[ 'wp_cache_debug_ip' ] );
		wp_cache_setting( 'wp_cache_debug_ip', $wp_cache_debug_ip );
		$wp_super_cache_front_page_check = isset( $_POST[ 'wp_super_cache_front_page_check' ] ) ? 1 : 0;
		wp_cache_setting( 'wp_super_cache_front_page_check', $wp_super_cache_front_page_check );
		$wp_super_cache_front_page_clear = isset( $_POST[ 'wp_super_cache_front_page_clear' ] ) ? 1 : 0;
		wp_cache_setting( 'wp_super_cache_front_page_clear', $wp_super_cache_front_page_clear );
		$wp_super_cache_front_page_text = esc_html( $_POST[ 'wp_super_cache_front_page_text' ] );
		wp_cache_setting( 'wp_super_cache_front_page_text', $wp_super_cache_front_page_text );
		$wp_super_cache_front_page_notification = isset( $_POST[ 'wp_super_cache_front_page_notification' ] ) ? 1 : 0;
		wp_cache_setting( 'wp_super_cache_front_page_notification', $wp_super_cache_front_page_notification );
		if ( $wp_super_cache_front_page_check == 1 && !wp_next_scheduled( 'wp_cache_check_site_hook' ) ) {
			wp_schedule_single_event( time() + 360 , 'wp_cache_check_site_hook' );
			wp_cache_debug( 'scheduled wp_cache_check_site_hook for 360 seconds time.' );
		}
	}

	return array (
		'wp_super_cache_debug' => $wp_super_cache_debug,
		'wp_cache_debug_log' => $wp_cache_debug_log,
		'wp_cache_debug_ip' => $wp_cache_debug_ip,
		'wp_super_cache_comments' => $wp_super_cache_comments,
		'wp_super_cache_front_page_check' => $wp_super_cache_front_page_check,
		'wp_super_cache_front_page_clear' => $wp_super_cache_front_page_clear,
		'wp_super_cache_front_page_text' => $wp_super_cache_front_page_text,
		'wp_super_cache_front_page_notification' => $wp_super_cache_front_page_notification,
		'wp_super_cache_advanced_debug' => $wp_super_cache_advanced_debug,
		'wp_cache_debug_username' => $wp_cache_debug_username,
	);
}

function wp_cache_debug_settings() {
	global $wp_super_cache_debug, $wp_cache_debug_log, $wp_cache_debug_ip, $cache_path, $valid_nonce, $wp_cache_config_file, $wp_super_cache_comments;
	global $wp_super_cache_front_page_check, $wp_super_cache_front_page_clear, $wp_super_cache_front_page_text, $wp_super_cache_front_page_notification, $wp_super_cache_advanced_debug;
	global $wp_cache_debug_username;

	extract( wpsc_update_debug_settings() ); // $wp_super_cache_debug, $wp_cache_debug_log, $wp_cache_debug_ip, $wp_super_cache_comments, $wp_super_cache_front_page_check, $wp_super_cache_front_page_clear, $wp_super_cache_front_page_text, $wp_super_cache_front_page_notification, $wp_super_cache_advanced_debug, $wp_cache_debug_username

	echo '';
	echo '
';
	echo '
' . __( 'Fix problems with the plugin by debugging it here. It will log to a file in your cache directory.', 'wp-super-cache' ) . '
';
	if ( ! isset( $wp_cache_debug_log ) || $wp_cache_debug_log == '' ) {
		extract( wpsc_create_debug_log() ); // $wp_cache_debug_log, $wp_cache_debug_username
	}
	$log_file_link = "$wp_cache_debug_log";
	if ( $wp_super_cache_debug == 1 ) {
		echo "
" . sprintf( __( 'Currently logging to: %s', 'wp-super-cache' ), $log_file_link ) . "
";
	} else {
		echo "
" . sprintf( __( 'Last Logged to: %s', 'wp-super-cache' ), $log_file_link ) . "
";
	}
	echo "
" . sprintf( __( 'Username/Password: %s', 'wp-super-cache' ), $wp_cache_debug_username ) . "
";

	echo '
';
	wp_nonce_field('wp-cache');
	submit_button( __( 'Delete', 'wp-super-cache' ), 'delete', 'wpsc_delete_log', false );
	echo "
";
	echo '
';
	if ( ! isset( $wp_super_cache_debug ) || $wp_super_cache_debug == 0 ) {
		$debug_status_message = __( 'Enable Logging', 'wp-super-cache' );
		$not_status = 1;
	} else {
		$debug_status_message = __( 'Disable Logging', 'wp-super-cache' );
		$not_status = 0;
	}
	echo "";
	wp_nonce_field('wp-cache');
	submit_button( $debug_status_message, 'primary', 'wpsc_log_status', true );
	echo "
";
	echo '
';
	echo "
";
	echo "";
	echo "";
	echo "";
	echo "
" . __( 'IP Address', 'wp-super-cache' ) . "
  " . sprintf( __( '(only log requests from this IP address. Your IP is %s)', 'wp-super-cache' ), $_SERVER[ 'REMOTE_ADDR' ] ) . "
" . __( 'Cache Status Messages', 'wp-super-cache' ) . "
 " . __( 'enabled', 'wp-super-cache' ) . "
";
	echo  __( 'Display comments at the end of every page like this:', 'wp-super-cache' ) . "
";
	echo "
<!-- Dynamic page generated in 0.450 seconds. -->
<!-- Cached page generated by WP-Super-Cache on " . date( "Y-m-d H:i:s", time() ) . " -->
<!-- super cache -->
\n";
	if ( isset( $wp_super_cache_advanced_debug ) ) {
	echo "
" . __( 'Advanced', 'wp-super-cache' ) . "
" . __( 'In very rare cases two problems may arise on some blogs:
 The front page may start downloading as a zip file.
 The wrong page is occasionally cached as the front page if your blog uses a static front page and the permalink structure is /%category%/%postname%/.
', 'wp-super-cache' ) . '
';
	echo "
" . __( 'I’m 99% certain that they aren’t bugs in WP Super Cache and they only happen in very rare cases but you can run a simple check once every 5 minutes to verify that your site is ok if you’re worried. You will be emailed if there is a problem.', 'wp-super-cache' ) . "
";
	echo "";
	echo "";
	echo "";
	echo "";
	echo "";

	echo "
 " . __( 'Check front page every 5 minutes.', 'wp-super-cache' ) . "
" . __( 'Front page text', 'wp-super-cache' ) . "
  (" . __( 'Text to search for on your front page. If this text is missing, the cache will be cleared. Leave blank to disable.', 'wp-super-cache' ) . ")
 " . __( 'Clear cache on error.', 'wp-super-cache' ) . "
 " . __( 'Email the blog admin when checks are made. (useful for testing)', 'wp-super-cache' ) . "
\n";
	}
	echo '
';
	wp_nonce_field('wp-cache');
	echo "
\n";
	echo '
';
}

function wp_cache_enable() {
	global $wp_cache_config_file, $cache_enabled;

	if( wp_cache_replace_line('^ *\$cache_enabled', '$cache_enabled = true;', $wp_cache_config_file) ) {
		$cache_enabled = true;
	}

	if ( wpsc_set_default_gc() ) {
		// gc might not be scheduled, check and schedule
		$timestamp = wp_next_scheduled( 'wp_cache_gc' );
		if ( false == $timestamp ) {
			wp_schedule_single_event( time() + 600, 'wp_cache_gc' );
		}
	}
}

function wp_cache_disable() {
	global $wp_cache_config_file, $cache_enabled;

	wp_clear_scheduled_hook( 'wp_cache_check_site_hook' );
	wp_clear_scheduled_hook( 'wp_cache_gc' );
	wp_clear_scheduled_hook( 'wp_cache_gc_watcher' );
	if (wp_cache_replace_line('^ *\$cache_enabled', '$cache_enabled = false;', $wp_cache_config_file)) {
		$cache_enabled = false;
	}
}
function wp_super_cache_enable() {
	global $supercachedir, $wp_cache_config_file, $super_cache_enabled;

	if( is_dir( $supercachedir . ".disabled" ) )
		if( is_dir( $supercachedir ) ) {
			prune_super_cache( $supercachedir . ".disabled", true );
			@unlink( $supercachedir . ".disabled" );
		} else {
			@rename( $supercachedir . ".disabled", $supercachedir );
		}
	wp_cache_replace_line('^ *\$super_cache_enabled', '$super_cache_enabled = true;', $wp_cache_config_file);
	$super_cache_enabled = true;
}

function wp_super_cache_disable() {
	global $cache_path, $supercachedir, $wp_cache_config_file, $super_cache_enabled;

	wp_cache_replace_line('^ *\$super_cache_enabled', '$super_cache_enabled = false;', $wp_cache_config_file);
	if( is_dir( $supercachedir ) )
		@rename( $supercachedir, $supercachedir . ".disabled" );
	$super_cache_enabled = false;
	sleep( 1 ); // allow existing processes to write to the supercachedir and then delete it
	if (function_exists ('prune_super_cache') && is_dir( $supercachedir ) ) {
		prune_super_cache( $cache_path, true );
	}
}

function wp_cache_is_enabled() {
	global $wp_cache_config_file;

	if(get_option('gzipcompression')) {
		echo "" . __( 'Warning', 'wp-super-cache' ) . ": " . __( "GZIP compression is enabled in WordPress, wp-cache will be bypassed until you disable gzip compression.", 'wp-super-cache' );
		return false;
	}
	$lines = file($wp_cache_config_file);
	foreach($lines as $line) {
	 	if (preg_match('/^ *\$cache_enabled *= *true *;/', $line))
			return true;
	}
	return false;
}

function wp_cache_setting( $field, $value ) {
	global $wp_cache_config_file;
	global ${$field};
	$$field = $value;
	if ( is_numeric( $value ) ) {
		wp_cache_replace_line( '^ *\$' . $field, "\$$field = $value;", $wp_cache_config_file );
	} elseif ( is_object( $value ) || is_array( $value ) ) {
		$text = var_export( $value, true );
		$text = preg_replace( '/[\s]+/', ' ', $text );
		wp_cache_replace_line( '^ *\$' . $field, "\$$field = $text;", $wp_cache_config_file );
	} else {
		wp_cache_replace_line( '^ *\$' . $field, "\$$field = '$value';", $wp_cache_config_file );
	}
}

function wp_cache_replace_line($old, $new, $my_file) {
	if ( @is_file( $my_file ) == false ) {
		return false;
	}
	if (!is_writeable_ACLSafe($my_file)) {
		echo "Error: file $my_file is not writable.\n";
		return false;
	}

	$found = false;
	$lines = file($my_file);
	foreach( (array)$lines as $line ) {
	 	if ( preg_match("/$old/", $line)) {
			$found = true;
			break;
		}
	}
	if ($found) {
		$fd = fopen($my_file, 'w');
		foreach( (array)$lines as $line ) {
			if ( !preg_match( "/$old/", $line ) ) {
				fputs($fd, $line);
			} elseif ( $new != '' ) {
				fputs($fd, "$new //Added by WP-Cache Manager\n");
			}
		}
		fclose($fd);
		return true;
	}
	$fd = fopen($my_file, 'w');
	$done = false;
	foreach( (array)$lines as $line ) {
		if ( $done || !preg_match('/^(if\ \(\ \!\ )?define|\$|\?>/', $line) ) {
			fputs($fd, $line);
		} else {
			fputs($fd, "$new //Added by WP-Cache Manager\n");
			fputs($fd, $line);
			$done = true;
		}
	}
	fclose($fd);
	return true;
}

function wp_cache_remove_index() {
	global $cache_path;

	if ( null === $cache_path || '' === $cache_path ) {
		return;
	}

	@unlink( $cache_path . "index.html" );
	@unlink( $cache_path . "supercache/index.html" );
	@unlink( $cache_path . "blogs/index.html" );
	if ( is_dir( $cache_path . "blogs" ) ) {
		$dir = new DirectoryIterator( $cache_path . "blogs" );
		foreach( $dir as $fileinfo ) {
			if ( $fileinfo->isDot() ) {
				continue;
			}
			if ( $fileinfo->isDir() ) {
				$directory = $cache_path . "blogs/" . $fileinfo->getFilename();
				if ( is_file( $directory . "/index.html" ) ) {
					unlink( $directory . "/index.html" );
				}
				if ( is_dir( $directory . "/meta" ) ) {
					if ( is_file( $directory . "/meta/index.html" ) ) {
						unlink( $directory . "/index.html" );
					}
				}
			}
		}
	}
}

function wp_cache_index_notice() {
	global $wp_version, $cache_path;

	if ( false == wpsupercache_site_admin() )
		return false;
	if ( false == get_site_option( 'wp_super_cache_index_detected' ) )
		return false;

	if ( strlen( $cache_path ) < strlen( ABSPATH )
		|| ABSPATH != substr( $cache_path, 0, strlen( ABSPATH ) ) )
		return false; // cache stored outside web root

	if ( get_site_option( 'wp_super_cache_index_detected' ) == 2 ) {
		update_site_option( 'wp_super_cache_index_detected', 3 );
		echo "
";
		echo "
" . __( 'WP Super Cache Warning!', 'wp-super-cache' ) . '
';
		echo '
' . __( 'All users of this site have been logged out to refresh their login cookies.', 'wp-super-cache' ) . '
';
		echo '
';
		return false;
	} elseif ( get_site_option( 'wp_super_cache_index_detected' ) != 3 ) {
		echo "
";
		echo "
" . __( 'WP Super Cache Warning!', 'wp-super-cache' ) . '
';
		echo '
' . __( 'Your server is configured to show files and directories, which may expose sensitive data such as login cookies to attackers in the cache directories. That has been fixed by adding a file named index.html to each directory. If you use simple caching, consider moving the location of the cache directory on the Advanced Settings page.', 'wp-super-cache' ) . '
';
		echo "
";
		_e( 'If you just installed WP Super Cache for the first time, you can dismiss this message. Otherwise, you should probably refresh the login cookies of all logged in WordPress users here by clicking the logout link below.', 'wp-super-cache' );
		echo "
";
		if ( -1 == version_compare( $wp_version, '4.0' ) ) {
			echo '
' . __( 'Your site is using a very old version of WordPress. When you update to the latest version everyone will be logged out and cookie information updated.', 'wp-super-cache' ) . '
';
		} else {
			echo '
' . __( 'The logout link will log out all WordPress users on this site except you. Your authentication cookie will be updated, but you will not be logged out.', 'wp-super-cache' ) . '
';
		}
		echo "" . __( 'Dismiss', 'wp-super-cache' ) . "";
		if ( 1 == version_compare( $wp_version, '4.0' ) ) {
			echo "	| " . __( 'Logout', 'wp-super-cache' ) . "";
		}
		echo "
";
?>
		
ID;
		WP_Session_Tokens::destroy_all_for_all_users();
		wp_set_auth_cookie( $user_id, false, is_ssl() );
		update_site_option( 'wp_super_cache_index_detected', 2 );
		wp_redirect( admin_url() );
	}
}
if ( isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] == 'wpsclogout' )
   add_action( 'admin_init', 'wp_cache_logout_all' );

function wp_cache_add_index_protection() {
	global $cache_path, $blog_cache_dir;

	if ( is_dir( $cache_path ) && false == is_file( "$cache_path/index.html" ) ) {
		$page = wp_remote_get( home_url( "/wp-content/cache/" ) );
		if ( false == is_wp_error( $page ) ) {
			if ( false == get_site_option( 'wp_super_cache_index_detected' )
				&& $page[ 'response' ][ 'code' ] == 200
				&& stripos( $page[ 'body' ], 'index of' ) ) {
				add_site_option( 'wp_super_cache_index_detected', 1 ); // only show this once
			}
		}
		insert_with_markers( $cache_path . '.htaccess', "INDEX", array( 'Options -Indexes' ) );
	}

	$directories = array( $cache_path, $cache_path . '/supercache/', $cache_path . '/blogs/', $blog_cache_dir, $blog_cache_dir . "/meta" );
	foreach( $directories as $dir ) {
		if ( false == is_dir( $dir ) )
			@mkdir( $dir );
		if ( is_dir( $dir ) && false == is_file( "$dir/index.html" ) ) {
			$fp = @fopen( "$dir/index.html", 'w' );
			if ( $fp )
				fclose( $fp );
		}
	}
}

function wp_cache_add_site_cache_index() {
	global $cache_path;

	wp_cache_add_index_protection(); // root and supercache

	if ( is_dir( $cache_path . "blogs" ) ) {
		$dir = new DirectoryIterator( $cache_path . "blogs" );
		foreach( $dir as $fileinfo ) {
			if ( $fileinfo->isDot() ) {
				continue;
			}
			if ( $fileinfo->isDir() ) {
				$directory = $cache_path . "blogs/" . $fileinfo->getFilename();
				if ( false == is_file( $directory . "/index.html" ) ) {
					$fp = @fopen( $directory . "/index.html", 'w' );
					if ( $fp )
						fclose( $fp );
				}
				if ( is_dir( $directory . "/meta" ) ) {
					if ( false == is_file( $directory . "/meta/index.html" ) ) {
						$fp = @fopen( $directory . "/meta/index.html", 'w' );
						if ( $fp )
							fclose( $fp );
					}
				}
			}
		}
	}
}

function wp_cache_verify_cache_dir() {
	global $cache_path, $blog_cache_dir;

	$dir = dirname($cache_path);
	if ( !file_exists($cache_path) ) {
		if ( !is_writeable_ACLSafe( $dir ) || !($dir = mkdir( $cache_path ) ) ) {
				echo "" . __( 'Error', 'wp-super-cache' ) . ": " . sprintf( __( 'Your cache directory (%1$s) did not exist and couldn’t be created by the web server. Check %1$s permissions.', 'wp-super-cache' ), $dir );
				return false;
		}
	}
	if ( !is_writeable_ACLSafe($cache_path)) {
		echo "" . __( 'Error', 'wp-super-cache' ) . ": " . sprintf( __( 'Your cache directory (%1$s) or %2$s need to be writable for this plugin to work. Double-check it.', 'wp-super-cache' ), $cache_path, $dir );
		return false;
	}

	if ( '/' != substr($cache_path, -1)) {
		$cache_path .= '/';
	}

	if( false == is_dir( $blog_cache_dir ) ) {
		@mkdir( $cache_path . "blogs" );
		if( $blog_cache_dir != $cache_path . "blogs/" )
			@mkdir( $blog_cache_dir );
	}

	if( false == is_dir( $blog_cache_dir . 'meta' ) )
		@mkdir( $blog_cache_dir . 'meta' );

	wp_cache_add_index_protection();
	return true;
}

function wp_cache_verify_config_file() {
	global $wp_cache_config_file, $wp_cache_config_file_sample, $sem_id, $cache_path;
	global $WPSC_HTTP_HOST;

	$new = false;
	$dir = dirname($wp_cache_config_file);

	if ( file_exists($wp_cache_config_file) ) {
		$lines = join( ' ', file( $wp_cache_config_file ) );
		if( strpos( $lines, 'WPCACHEHOME' ) === false ) {
			if( is_writeable_ACLSafe( $wp_cache_config_file ) ) {
				@unlink( $wp_cache_config_file );
			} else {
				echo "" . __( 'Error', 'wp-super-cache' ) . ": " . sprintf( __( 'Your WP-Cache config file (%s) is out of date and not writable by the Web server. Please delete it and refresh this page.', 'wp-super-cache' ), $wp_cache_config_file );
				return false;
			}
		}
	} elseif( !is_writeable_ACLSafe($dir)) {
		echo "" . __( 'Error', 'wp-super-cache' ) . ": " . sprintf( __( 'Configuration file missing and %1$s  directory (%2$s) is not writable by the web server. Check its permissions.', 'wp-super-cache' ), WP_CONTENT_DIR, $dir );
		return false;
	}

	if ( !file_exists($wp_cache_config_file) ) {
		if ( !file_exists($wp_cache_config_file_sample) ) {
			echo "" . __( 'Error', 'wp-super-cache' ) . ": " . sprintf( __( 'Sample WP-Cache config file (%s) does not exist. Verify your installation.', 'wp-super-cache' ), $wp_cache_config_file_sample );
			return false;
		}
		copy($wp_cache_config_file_sample, $wp_cache_config_file);
		$dir = str_replace( str_replace( '\\', '/', WP_CONTENT_DIR ), '', str_replace( '\\', '/', dirname(__FILE__) ) );
		if( is_file( dirname(__FILE__) . '/wp-cache-config-sample.php' ) ) {
			wp_cache_replace_line('define\(\ \'WPCACHEHOME', "\tdefine( 'WPCACHEHOME', WP_CONTENT_DIR . \"{$dir}/\" );", $wp_cache_config_file);
		} elseif( is_file( dirname(__FILE__) . '/wp-super-cache/wp-cache-config-sample.php' ) ) {
			wp_cache_replace_line('define\(\ \'WPCACHEHOME', "\tdefine( 'WPCACHEHOME', WP_CONTENT_DIR . \"{$dir}/wp-super-cache/\" );", $wp_cache_config_file);
		}
		$new = true;
	}
	if( $sem_id == 5419 && $cache_path != '' ) {
		$sem_id = crc32( $WPSC_HTTP_HOST . $cache_path ) & 0x7fffffff;
		wp_cache_replace_line('sem_id', '$sem_id = ' . $sem_id . ';', $wp_cache_config_file);
	}
	if ( $new ) {
		require($wp_cache_config_file);
		wpsc_set_default_gc( true );
	}
	return true;
}

function wp_cache_create_advanced_cache() {
	global $wp_cache_link, $wp_cache_file;
	if ( file_exists( ABSPATH . 'wp-config.php') ) {
		$global_config_file = ABSPATH . 'wp-config.php';
	} else {
		$global_config_file = dirname(ABSPATH) . '/wp-config.php';
	}

	$line = 'define( \'WPCACHEHOME\', \'' . dirname( __FILE__ ) . '/\' );';
	if ( !is_writeable_ACLSafe($global_config_file) || !wp_cache_replace_line('define *\( *\'WPCACHEHOME\'', $line, $global_config_file ) ) {
		echo '
' . __( 'Warning', 'wp-super-cache' ) . "! " . sprintf( __( 'Could not update %s! WPCACHEHOME must be set in config file.', 'wp-super-cache' ), $global_config_file ) . "
";
		return false;
	}
	$ret = true;

	$file = file_get_contents( $wp_cache_file );
	$fp = @fopen( $wp_cache_link, 'w' );
	if( $fp ) {
		fputs( $fp, $file );
		fclose( $fp );
	} else {
		$ret = false;
	}
	return $ret;
}

function wp_cache_check_link() {
	global $wp_cache_link, $wp_cache_file;

 	$ret = true;
	if( file_exists($wp_cache_link) ) {
		$file = file_get_contents( $wp_cache_link );
		if( strpos( $file, "WP SUPER CACHE 0.8.9.1" ) || strpos( $file, "WP SUPER CACHE 1.2" ) ) {
			return true;
		} else {
			if( !@unlink($wp_cache_link) ) {
				$ret = false;
			} else {
				$ret = wp_cache_create_advanced_cache();
			}
		}
	} else {
		$ret = wp_cache_create_advanced_cache();
	}

	if( false == $ret ) {
		echo '
' . __( 'Warning', 'wp-super-cache' ) . "! " . sprintf( __( '%s/advanced-cache.php does not exist or cannot be updated.', 'wp-super-cache' ), WP_CONTENT_DIR ) . "
";
		echo "
" . __( 'If it already exists, please delete the file first.', 'wp-super-cache' ) . "
";
		echo "
" . sprintf( __( 'Make %1$s writable using the chmod command through your ftp or server software. (chmod 777 %1$s) and refresh this page. This is only a temporary measure and you’ll have to make it read only afterwards again. (Change 777 to 755 in the previous command)', 'wp-super-cache' ), WP_CONTENT_DIR ) . "
";
		echo "
" . sprintf( __( 'Refresh this page to update %s/advanced-cache.php', 'wp-super-cache' ), WP_CONTENT_DIR ) . "
";
		echo sprintf( __( 'If that doesn’t work, make sure the file %s/advanced-cache.php doesn’t exist:', 'wp-super-cache' ), WP_CONTENT_DIR ) . "
";
		printf( __( '
Open %1$s in a text editor.
Change the text CACHEHOME to %2$s
 Save the file and copy it to %3$s and refresh this page.
', 'wp-super-cache' ), $wp_cache_file, WPCACHEHOME, $wp_cache_link );
		echo "
";
		echo "
";
		return false;
	}
	return true;
}

function wp_cache_check_global_config() {
	global $wp_cache_check_wp_config;

	if ( !isset( $wp_cache_check_wp_config ) )
		return true;


	if ( file_exists( ABSPATH . 'wp-config.php') ) {
		$global = ABSPATH . 'wp-config.php';
	} else {
		$global = dirname(ABSPATH) . '/wp-config.php';
	}

	$line = 'define(\'WP_CACHE\', true);';
	if (!is_writeable_ACLSafe($global) || !wp_cache_replace_line('define *\( *\'WP_CACHE\'', $line, $global) ) {
		if ( defined( 'WP_CACHE' ) && constant( 'WP_CACHE' ) == false ) {
			echo '
' . __( "
WP_CACHE constant set to false
The WP_CACHE constant is used by WordPress to load the code that serves cached pages. Unfortunately, it is set to false. Please edit your wp-config.php and add or edit the following line above the final require_once command:

define('WP_CACHE', true);
", 'wp-super-cache' ) . "
";
		} else {
			echo '
' . __( "Error: WP_CACHE is not enabled in your wp-config.php file and I couldn’t modify it.", 'wp-super-cache' ) . "
";
			echo "
" . sprintf( __( "Edit %s and add the following line:
 define('WP_CACHE', true);
Otherwise, WP-Cache will not be executed by WordPress core. ", 'wp-super-cache' ), $global ) . "
";
		}
		return false;
	}  else {
		echo "
" . __( '
WP_CACHE constant added to wp-config.php
If you continue to see this warning message please see point 5 of the Troubleshooting Guide. The WP_CACHE line must be moved up.', 'wp-super-cache' ) . "
";
	}
	return true;
}

function wpsc_generate_sizes_array() {
	$sizes = array();
	$cache_types  = apply_filters( 'wpsc_cache_types', array( 'supercache', 'wpcache' ) );
	$cache_states = apply_filters( 'wpsc_cache_state', array( 'expired', 'cached' ) );
	foreach( $cache_types as $type ) {
		reset( $cache_states );
		foreach( $cache_states as $state ) {
			$sizes[ $type ][ $state ] = 0;
		}
		$sizes[ $type ][ 'fsize' ] = 0;
		$sizes[ $type ][ 'cached_list' ] = array();
		$sizes[ $type ][ 'expired_list' ] = array();
	}
	return $sizes;
}

function wp_cache_format_fsize( $fsize ) {
	if ( $fsize > 1024 ) {
		$fsize = number_format( $fsize / 1024, 2 ) . "MB";
	} elseif ( $fsize != 0 ) {
		$fsize = number_format( $fsize, 2 ) . "KB";
	} else {
		$fsize = "0KB";
	}
	return $fsize;
}

function wp_cache_regenerate_cache_file_stats() {
	global $cache_compression, $supercachedir, $file_prefix, $wp_cache_preload_on, $cache_max_time;

	if ( $supercachedir == '' )
		$supercachedir = get_supercache_dir();

	$sizes = wpsc_generate_sizes_array();
	$now = time();
	if (is_dir( $supercachedir ) ) {
		if ( $dh = opendir( $supercachedir ) ) {
			while ( ( $entry = readdir( $dh ) ) !== false ) {
				if ( $entry != '.' && $entry != '..' ) {
					$sizes = wpsc_dirsize( trailingslashit( $supercachedir ) . $entry, $sizes );
				}
			}
			closedir( $dh );
		}
	}
	foreach( $sizes as $cache_type => $list ) {
		foreach( array( 'cached_list', 'expired_list' ) as $status ) {
			$cached_list = array();
			foreach( $list[ $status ] as $dir => $details ) {
				if ( $details[ 'files' ] == 2 && !isset( $details[ 'upper_age' ] ) ) {
					$details[ 'files' ] = 1;
				}
				$cached_list[ $dir ] = $details;
			}
			$sizes[ $cache_type ][ $status ] = $cached_list;
		}
	}
	if ( $cache_compression ) {
		$sizes[ 'supercache' ][ 'cached' ]  = intval( $sizes[ 'supercache' ][ 'cached' ] / 2 );
		$sizes[ 'supercache' ][ 'expired' ] = intval( $sizes[ 'supercache' ][ 'expired' ] / 2 );
	}
	$cache_stats = array( 'generated' => time(), 'supercache' => $sizes[ 'supercache' ], 'wpcache' => $sizes[ 'wpcache' ] );
	update_option( 'supercache_stats', $cache_stats );
	return $cache_stats;
}

function wp_cache_files() {
	global $cache_path, $file_prefix, $cache_max_time, $valid_nonce, $supercachedir, $super_cache_enabled, $blog_cache_dir, $cache_compression;
	global $wp_cache_object_cache, $wp_cache_preload_on;

	if ( '/' != substr($cache_path, -1)) {
		$cache_path .= '/';
	}

	if ( $valid_nonce ) {
		if(isset($_REQUEST['wp_delete_cache'])) {
			wp_cache_clean_cache($file_prefix);
			$_GET[ 'action' ] = 'regenerate_cache_stats';
		}
		if ( isset( $_REQUEST[ 'wp_delete_all_cache' ] ) ) {
			wp_cache_clean_cache( $file_prefix, true );
			$_GET[ 'action' ] = 'regenerate_cache_stats';
		}
		if(isset($_REQUEST['wp_delete_expired'])) {
			wp_cache_clean_expired($file_prefix);
			$_GET[ 'action' ] = 'regenerate_cache_stats';
		}
	}
	echo "";
	echo '
' . __( 'Cache Contents', 'wp-super-cache' ) . '
';

	if ( $wp_cache_object_cache ) {
		echo "
" . __( "Object cache in use. No cache listing available.", 'wp-super-cache' ) . "
";
		wp_cache_delete_buttons();
		echo "
";
		return false;
	}

	$cache_stats = get_option( 'supercache_stats' );
	if ( !is_array( $cache_stats ) || ( isset( $_GET[ 'listfiles' ] ) ) || ( $valid_nonce && array_key_exists('action', $_GET) && $_GET[ 'action' ] == 'regenerate_cache_stats' ) ) {
	$count = 0;
	$expired = 0;
	$now = time();
	if ( ( $handle = @opendir( $blog_cache_dir ) ) ) {
		$wp_cache_fsize = 0;
		if ( $valid_nonce && isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] == 'deletewpcache' ) {
			$deleteuri = wpsc_deep_replace( array( '..', '\\', 'index.php' ), preg_replace( '/[ <>\'\"\r\n\t\(\)]/', '', base64_decode( $_GET[ 'uri' ] ) ) );
		} else {
			$deleteuri = '';
		}

		if ( $valid_nonce && isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] == 'deletesupercache' ) {
			$supercacheuri = wpsc_deep_replace( array( '..', '\\', 'index.php' ), preg_replace( '/[ <>\'\"\r\n\t\(\)]/', '', preg_replace("/(\?.*)?$/", '', base64_decode( $_GET[ 'uri' ] ) ) ) );
			$supercacheuri = trailingslashit( realpath( $cache_path . 'supercache/' . $supercacheuri ) );
			if ( wp_cache_confirm_delete( $supercacheuri ) ) {
				printf( __( "Deleting supercache file: %s
", 'wp-super-cache' ), $supercacheuri );
				wpsc_delete_files( $supercacheuri );
				prune_super_cache( $supercacheuri . 'page', true );
				@rmdir( $supercacheuri );
			} else {
				wp_die( __( 'Warning! You are not allowed to delete that file', 'wp-super-cache' ) );
			}
		}
		while( false !== ( $file = readdir( $handle ) ) ) {
			if ( strpos( $file, $file_prefix ) !== false && substr( $file, -4 ) == '.php' ) {
				if ( false == file_exists( $blog_cache_dir . 'meta/' . $file ) ) {
					@unlink( $blog_cache_dir . $file );
					continue; // meta does not exist
				}
				$mtime = filemtime( $blog_cache_dir . 'meta/' . $file );
				$fsize = @filesize( $blog_cache_dir . $file );
				if ( $fsize > 0 )
					$fsize = $fsize - 15; // die() command takes 15 bytes at the start of the file

				$age = $now - $mtime;
				if ( $valid_nonce && isset( $_GET[ 'listfiles' ] ) ) {
					$meta = json_decode( wp_cache_get_legacy_cache( $blog_cache_dir . 'meta/' . $file ), true );
					if ( $deleteuri != '' && $meta[ 'uri' ] == $deleteuri ) {
						printf( __( "Deleting wp-cache file: %s
", 'wp-super-cache' ), esc_html( $deleteuri ) );
						@unlink( $blog_cache_dir . 'meta/' . $file );
						@unlink( $blog_cache_dir . $file );
						continue;
					}
					$meta[ 'age' ] = $age;
					foreach( $meta as $key => $val )
						$meta[ $key ] = esc_html( $val );
					if ( $cache_max_time > 0 && $age > $cache_max_time ) {
						$expired_list[ $age ][] = $meta;
					} else {
						$cached_list[ $age ][] = $meta;
					}
				}

				if ( $cache_max_time > 0 && $age > $cache_max_time ) {
					$expired++;
				} else {
					$count++;
				}
				$wp_cache_fsize += $fsize;
			}
		}
		closedir($handle);
	}
	if( $wp_cache_fsize != 0 ) {
		$wp_cache_fsize = $wp_cache_fsize/1024;
	} else {
		$wp_cache_fsize = 0;
	}
	if( $wp_cache_fsize > 1024 ) {
		$wp_cache_fsize = number_format( $wp_cache_fsize / 1024, 2 ) . "MB";
	} elseif( $wp_cache_fsize != 0 ) {
		$wp_cache_fsize = number_format( $wp_cache_fsize, 2 ) . "KB";
	} else {
		$wp_cache_fsize = '0KB';
	}
	$cache_stats = wp_cache_regenerate_cache_file_stats();
	} else {
		echo "
" . __( 'Cache stats are not automatically generated. You must click the link below to regenerate the stats on this page.', 'wp-super-cache' ) . "
";
		echo " 'wpsupercache', 'tab' => 'contents', 'action' => 'regenerate_cache_stats' ) ), 'wp-cache' ) . "'>" . __( 'Regenerate cache stats', 'wp-super-cache' ) . "";
		if ( is_array( $cache_stats ) ) {
			echo "
" . sprintf( __( 'Cache stats last generated: %s minutes ago.', 'wp-super-cache' ), number_format( ( time() - $cache_stats[ 'generated' ] ) / 60 ) ) . "
";
		}
		$cache_stats = get_option( 'supercache_stats' );
	}// regerate stats cache

	if ( is_array( $cache_stats ) ) {
		$fsize = wp_cache_format_fsize( $cache_stats[ 'wpcache' ][ 'fsize' ] / 1024 );
		echo "
" . __( 'WP-Cache', 'wp-super-cache' ) . " ({$fsize})
";
		echo "
" . sprintf( __( '%s Cached Pages', 'wp-super-cache' ), $cache_stats[ 'wpcache' ][ 'cached' ] ) . "
";
		echo "
" . sprintf( __( '%s Expired Pages', 'wp-super-cache' ),    $cache_stats[ 'wpcache' ][ 'expired' ] ) . "
";
		if ( array_key_exists('fsize', (array)$cache_stats[ 'supercache' ]) )
			$fsize = $cache_stats[ 'supercache' ][ 'fsize' ] / 1024;
		else
			$fsize = 0;
		$fsize = wp_cache_format_fsize( $fsize );
		echo "
" . __( 'WP-Super-Cache', 'wp-super-cache' ) . " ({$fsize})
";
		echo "
" . sprintf( __( '%s Cached Pages', 'wp-super-cache' ), $cache_stats[ 'supercache' ][ 'cached' ] ) . "
";
		if ( isset( $now ) && isset( $cache_stats ) )
			$age = intval( ( $now - $cache_stats['generated'] ) / 60 );
		else
			$age = 0;
		echo "
" . sprintf( __( '%s Expired Pages', 'wp-super-cache' ), $cache_stats[ 'supercache' ][ 'expired' ] ) . "
";
		if ( $valid_nonce && array_key_exists('listfiles', $_GET) && $_GET[ 'listfiles' ] ) {
			echo "
";
			$cache_description = array( 'supercache' => __( 'Super Cached Files', 'wp-super-cache' ), 'wpcache' => __( 'Full Cache Files', 'wp-super-cache' ) );
			foreach( $cache_stats as $type => $details ) {
				if ( is_array( $details ) == false )
					continue;
				foreach( array( 'cached_list' => 'Fresh', 'expired_list' => 'Stale' ) as $list => $description ) {
					if ( is_array( $details[ $list ] ) & !empty( $details[ $list ] ) ) {
						echo "
" . sprintf( __( '%s %s Files', 'wp-super-cache' ), $description, $cache_description[ $type ] ) . "
";
						echo "";
						$c = 1;
						$flip = 1;

						ksort( $details[ $list ] );
						foreach( $details[ $list ] as $directory => $d ) {
							if ( isset( $d[ 'upper_age' ] ) ) {
								$age = "{$d[ 'lower_age' ]} - {$d[ 'upper_age' ]}";
							} else {
								$age = $d[ 'lower_age' ];
							}
							$bg = $flip ? 'style="background: #EAEAEA;"' : '';
							echo "\n";
							$flip = !$flip;
							$c++;
						}
						echo "
#
" . __( 'URI', 'wp-super-cache' ) . "
" . __( 'Files', 'wp-super-cache' ) . "
" . __( 'Age', 'wp-super-cache' ) . "
" . __( 'Delete', 'wp-super-cache' ) . "
$c
 {$directory}
{$d[ 'files' ]}
{$age}
 'wpsupercache', 'action' => 'deletesupercache', 'uri' => base64_encode( $directory ) ) ), 'wp-cache' ) . "#listfiles'>X
";
					}
				}
			}
			echo "
";
			echo "
" . __( 'Hide file list', 'wp-super-cache' ) . "
";
		} elseif ( $cache_stats[ 'supercache' ][ 'cached' ] > 500 || $cache_stats[ 'supercache' ][ 'expired' ] > 500 || $cache_stats[ 'wpcache' ][ 'cached' ] > 500 || $cache_stats[ 'wpcache' ][ 'expired' ] > 500 ) {
			echo "
" . __( 'Too many cached files, no listing possible.', 'wp-super-cache' ) . "
";
		} else {
			echo "
 'wpsupercache', 'listfiles' => '1' ) ), 'wp-cache' ) . "#listfiles'>" . __( 'List all cached files', 'wp-super-cache' ) . "
";
		}
		if ( $cache_max_time > 0 )
			echo "
" . sprintf( __( 'Expired files are files older than %s seconds. They are still used by the plugin and are deleted periodically.', 'wp-super-cache' ), $cache_max_time ) . "
";
		if ( $wp_cache_preload_on )
			echo "
" . __( 'Preload mode is enabled. Supercache files will never be expired.', 'wp-super-cache' ) . "
";
	} // cache_stats
	wp_cache_delete_buttons();

	echo '';
}

function wp_cache_delete_buttons() {

	echo '
';
	echo '';
	echo '
';
	wp_nonce_field('wp-cache');
	echo "
\n";

	echo '
';
	echo '';
	echo '
';
	wp_nonce_field('wp-cache');
	echo "
\n";
	if ( ( defined( 'VHOST' ) || defined( 'SUBDOMAIN_INSTALL' ) || defined( 'SUNRISE' ) || ( defined( 'WP_ALLOW_MULTISITE' ) && constant( 'WP_ALLOW_MULTISITE' ) == true ) ) && wpsupercache_site_admin() ) {
		echo '
';
		echo '';
		echo '
';
		wp_nonce_field('wp-cache');
		echo "
\n";
	}
}

function delete_cache_dashboard() {
	if ( false == wpsupercache_site_admin() )
		return false;

	if ( function_exists('current_user_can') && !current_user_can('manage_options') )
		return false;

	echo "
" . __( 'Delete Cache', 'wp-super-cache' ) . "
";
}
add_action( 'dashmenu', 'delete_cache_dashboard' );

function wpsc_dirsize($directory, $sizes) {
	global $cache_max_time, $cache_path, $valid_nonce, $wp_cache_preload_on, $file_prefix;
	$now = time();

	if (is_dir($directory)) {
		if( $dh = opendir( $directory ) ) {
			while( ( $entry = readdir( $dh ) ) !== false ) {
				if ($entry != '.' && $entry != '..') {
					$sizes = wpsc_dirsize( trailingslashit( $directory ) . $entry, $sizes );
				}
			}
			closedir($dh);
		}
	} else {
		if ( is_file( $directory ) && strpos( $directory, 'meta-' . $file_prefix ) === false ) {
			if ( strpos( $directory, '/' . $file_prefix ) !== false ) {
				$cache_type = 'wpcache';
			} else {
				$cache_type = 'supercache';
			}
			$keep_fresh = false;
			if ( $cache_type == 'supercache' && $wp_cache_preload_on )
				$keep_fresh = true;
			$filem = filemtime( $directory );
			if ( $keep_fresh == false && $cache_max_time > 0 && $filem + $cache_max_time <= $now ) {
				$cache_status = 'expired';
			} else {
				$cache_status = 'cached';
			}
			$sizes[ $cache_type ][ $cache_status ]+=1;
			if ( $valid_nonce && isset( $_GET[ 'listfiles' ] ) ) {
				$dir = str_replace( $cache_path . 'supercache/' , '', dirname( $directory ) );
				$age = $now - $filem;
				if ( false == isset( $sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ] ) ) {
					$sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'lower_age' ] = $age;
					$sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'files' ] = 1;
				} else {
					$sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'files' ] += 1;
					if ( $age <= $sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'lower_age' ] ) {

						if ( $age < $sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'lower_age' ] && !isset( $sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'upper_age' ] ) )
							$sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'upper_age' ] = $sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'lower_age' ];

						$sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'lower_age' ] = $age;

					} elseif ( !isset( $sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'upper_age' ] ) || $age > $sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'upper_age' ] ) {

						$sizes[ $cache_type ][ $cache_status . '_list' ][ $dir ][ 'upper_age' ] = $age;

					}
				}
			}
			if ( ! isset( $sizes[ 'fsize' ] ) )
				$sizes[ $cache_type ][ 'fsize' ] = @filesize( $directory );
			else
				$sizes[ $cache_type ][ 'fsize' ] += @filesize( $directory );
		}
	}
	return $sizes;
}

function wp_cache_clean_cache( $file_prefix, $all = false ) {
	global $cache_path, $supercachedir, $blog_cache_dir, $wp_cache_object_cache;

	if ( $wp_cache_object_cache && function_exists( "reset_oc_version" ) )
		reset_oc_version();

	if ( $all == true && wpsupercache_site_admin() && function_exists( 'prune_super_cache' ) ) {
		prune_super_cache( $cache_path, true );
		return true;
	}
	if ( $supercachedir == '' )
		$supercachedir = get_supercache_dir();

	if (function_exists ('prune_super_cache')) {
		if( is_dir( $supercachedir ) ) {
			prune_super_cache( $supercachedir, true );
		} elseif( is_dir( $supercachedir . '.disabled' ) ) {
			prune_super_cache( $supercachedir . '.disabled', true );
		}
		$_POST[ 'super_cache_stats' ] = 1; // regenerate super cache stats;
	} else {
		wp_cache_debug( 'Warning! prune_super_cache() not found in wp-cache.php', 1 );
	}

	wp_cache_clean_legacy_files( $blog_cache_dir, $file_prefix );
	wp_cache_clean_legacy_files( $cache_path, $file_prefix );

}

function wpsc_delete_url_cache( $url ) {
	$dir = str_replace( get_option( 'home' ), '', $url );
	if ( $dir != '' ) {
		$supercachedir = get_supercache_dir();
		wpsc_delete_files( $supercachedir . $dir );
		prune_super_cache( $supercachedir . $dir . '/page', true );
		return true;
	} else {
		return false;
	}
}

function wpsc_delete_post_cache( $id ) {
	$post = get_post( $id );
	wpsc_delete_url_cache( get_author_posts_url( $post->post_author ) );
	$permalink = get_permalink( $id );
	if ( $permalink != '' ) {
		wpsc_delete_url_cache( $permalink );
		return true;
	} else {
		return false;
	}
}

function wp_cache_clean_legacy_files( $dir, $file_prefix ) {
	global $wpdb;

	$dir = trailingslashit( $dir );
	if ( @is_dir( $dir . 'meta' ) == false )
		return false;

	if ( $handle = @opendir( $dir ) ) {
		while ( false !== ( $file = readdir( $handle ) ) ) {
			if ( is_file( $dir . $file ) == false || $file == 'index.html' ) {
				continue;
			}

			if ( strpos( $file, $file_prefix ) !== false ) {
				if ( strpos( $file, '.html' ) ) {
					// delete old WPCache files immediately
					@unlink( $dir . $file);
					@unlink( $dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
				} else {
					$meta = json_decode( wp_cache_get_legacy_cache( $dir . 'meta/' . $file ), true );
					if ( ( defined( 'VHOST' ) || defined( 'SUBDOMAIN_INSTALL' ) || defined( 'SUNRISE' ) || ( defined( 'WP_ALLOW_MULTISITE' ) && constant( 'WP_ALLOW_MULTISITE' ) == true ) ) && $meta[ 'blog_id' ] != $wpdb->blogid )
						continue;
					@unlink( $dir . $file);
					@unlink( $dir . 'meta/' . $file);
				}
			}
		}
		closedir($handle);
	}
}

function wp_cache_clean_expired($file_prefix) {
	global $cache_max_time, $blog_cache_dir, $wp_cache_preload_on;

	if ( $cache_max_time == 0 ) {
		return false;
	}

	// If phase2 was compiled, use its function to avoid race-conditions
	if(function_exists('wp_cache_phase2_clean_expired')) {
		if ( $wp_cache_preload_on != 1 && function_exists ('prune_super_cache')) {
			$dir = get_supercache_dir();
			if( is_dir( $dir ) ) {
				prune_super_cache( $dir );
			} elseif( is_dir( $dir . '.disabled' ) ) {
				prune_super_cache( $dir . '.disabled' );
			}
			$_POST[ 'super_cache_stats' ] = 1; // regenerate super cache stats;
		}
		return wp_cache_phase2_clean_expired($file_prefix);
	}

	$now = time();
	if ( $handle = @opendir( $blog_cache_dir ) ) {
		while ( false !== ( $file = readdir( $handle ) ) ) {
			if ( strpos( $file, $file_prefix ) !== false ) {
				if ( strpos( $file, '.html' ) ) {
					@unlink( $blog_cache_dir . $file);
					@unlink( $blog_cache_dir . 'meta/' . str_replace( '.html', '.meta', $file ) );
				} elseif ( ( filemtime( $blog_cache_dir . $file ) + $cache_max_time ) <= $now ) {
					@unlink( $blog_cache_dir . $file );
					@unlink( $blog_cache_dir . 'meta/' . $file );
				}
			}
		}
		closedir($handle);
	}
}

function wpsc_remove_marker( $filename, $marker ) {
	if (!file_exists( $filename ) || is_writeable_ACLSafe( $filename ) ) {
		if (!file_exists( $filename ) ) {
			return '';
		} else {
			$markerdata = explode( "\n", implode( '', file( $filename ) ) );
		}

		$f = fopen( $filename, 'w' );
		if ( $markerdata ) {
			$state = true;
			foreach ( $markerdata as $n => $markerline ) {
				if (strpos($markerline, '# BEGIN ' . $marker) !== false)
					$state = false;
				if ( $state ) {
					if ( $n + 1 < count( $markerdata ) )
						fwrite( $f, "{$markerline}\n" );
					else
						fwrite( $f, "{$markerline}" );
				}
				if (strpos($markerline, '# END ' . $marker) !== false) {
					$state = true;
				}
			}
		}
		return true;
	} else {
		return false;
	}
}

function wp_super_cache_footer() {
	?>
WP Super Cache' ); ?>
is_404
function wp_cache_catch_404() {
	global $wp_cache_404;
	$wp_cache_404 = false;
	if( is_404() )
		$wp_cache_404 = true;
}
add_action( 'template_redirect', 'wp_cache_catch_404' );

function wp_cache_favorite_action( $actions ) {
	if ( false == wpsupercache_site_admin() )
		return $actions;

	if ( function_exists('current_user_can') && !current_user_can('manage_options') )
		return $actions;

	$actions[ wp_nonce_url( 'options-general.php?page=wpsupercache&wp_delete_cache=1&tab=contents', 'wp-cache' ) ] = array( __( 'Delete Cache', 'wp-super-cache' ), 'manage_options' );

	return $actions;
}
add_filter( 'favorite_actions', 'wp_cache_favorite_action' );

function wp_cache_plugin_notice( $plugin ) {
	global $cache_enabled;
 	if( $plugin == 'wp-super-cache/wp-cache.php' && !$cache_enabled && function_exists( "admin_url" ) )
		echo '' . sprintf( __( 'WP Super Cache must be configured. Go to the admin page to enable and configure the plugin.', 'wp-super-cache' ), admin_url( 'options-general.php?page=wpsupercache' ) ) . '';
}
add_action( 'after_plugin_row', 'wp_cache_plugin_notice' );

function wp_cache_plugin_actions( $links, $file ) {
 	if( $file == 'wp-super-cache/wp-cache.php' && function_exists( "admin_url" ) ) {
		$settings_link = '' . __( 'Settings', 'wp-super-cache' ) . '';
		array_unshift( $links, $settings_link ); // before other links
	}
	return $links;
}
add_filter( 'plugin_action_links', 'wp_cache_plugin_actions', 10, 2 );

function wp_cache_admin_notice() {
	global $cache_enabled, $wp_cache_phase1_loaded;
	if( substr( $_SERVER["PHP_SELF"], -11 ) == 'plugins.php' && !$cache_enabled && function_exists( "admin_url" ) )
		echo '
' . sprintf( __('WP Super Cache is disabled. Please go to the plugin admin page to enable caching.', 'wp-super-cache' ), admin_url( 'options-general.php?page=wpsupercache' ) ) . '
';

	if ( defined( 'WP_CACHE' ) && WP_CACHE == true && ( defined( 'ADVANCEDCACHEPROBLEM' ) || ( $cache_enabled && false == isset( $wp_cache_phase1_loaded ) ) ) ) {
		echo '
' . sprintf( __( 'Warning! WP Super Cache caching was broken but has been fixed! The script advanced-cache.php could not load wp-cache-phase1.php.

The file %1$s/advanced-cache.php has been recreated and WPCACHEHOME fixed in your wp-config.php. Reload to hide this message.', 'wp-super-cache' ), WP_CONTENT_DIR ) . '
';
		wp_cache_create_advanced_cache();
	}
}
add_action( 'admin_notices', 'wp_cache_admin_notice' );

function wp_cache_check_site() {
	global $wp_super_cache_front_page_check, $wp_super_cache_front_page_clear, $wp_super_cache_front_page_text, $wp_super_cache_front_page_notification, $wpdb;

	if ( !isset( $wp_super_cache_front_page_check ) || ( isset( $wp_super_cache_front_page_check ) && $wp_super_cache_front_page_check == 0 ) ) {
		return false;
	}

	if ( function_exists( "wp_remote_get" ) == false ) {
		return false;
	}
	$front_page = wp_remote_get( site_url(), array('timeout' => 60, 'blocking' => true ) );
	if( is_array( $front_page ) ) {
		// Check for gzipped front page
                if ( $front_page[ 'headers' ][ 'content-type' ] == 'application/x-gzip' ) {
                        if ( !isset( $wp_super_cache_front_page_clear ) || ( isset( $wp_super_cache_front_page_clear ) && $wp_super_cache_front_page_clear == 0 ) ) {
                                wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Front page is gzipped! Please clear cache!', 'wp-super-cache' ), home_url() ), sprintf( __( "Please visit %s to clear the cache as the front page of your site is now downloading!", 'wp-super-cache' ), admin_url( 'options-general.php?page=wpsupercache' ) ) );
                        } else {
                                wp_cache_clear_cache( $wpdb->blogid );
                                wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Front page is gzipped! Cache Cleared!', 'wp-super-cache' ), home_url() ), sprintf( __( "The cache on your blog has been cleared because the front page of your site is now downloading. Please visit %s to verify the cache has been cleared.", 'wp-super-cache' ), admin_url( 'options-general.php?page=wpsupercache' ) ) );
                        }
                }

		// Check for broken front page
		if ( isset( $wp_super_cache_front_page_text ) && $wp_super_cache_front_page_text != '' && false === strpos( $front_page[ 'body' ], $wp_super_cache_front_page_text ) ) {
			if ( !isset( $wp_super_cache_front_page_clear ) || ( isset( $wp_super_cache_front_page_clear ) && $wp_super_cache_front_page_clear == 0 ) ) {
                                wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Front page is not correct! Please clear cache!', 'wp-super-cache' ), home_url() ), sprintf( __( 'Please visit %1$s to clear the cache as the front page of your site is not correct and missing the text, "%2$s"!', 'wp-super-cache' ), admin_url( 'options-general.php?page=wpsupercache' ), $wp_super_cache_front_page_text ) );
                        } else {
                                wp_cache_clear_cache( $wpdb->blogid );
                                wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Front page is not correct! Cache Cleared!', 'wp-super-cache' ), home_url() ), sprintf( __( 'The cache on your blog has been cleared because the front page of your site is missing the text "%2$s". Please visit %1$s to verify the cache has been cleared.', 'wp-super-cache' ), admin_url( 'options-general.php?page=wpsupercache' ), $wp_super_cache_front_page_text ) );
			}
		}
	}
	if ( isset( $wp_super_cache_front_page_notification ) && $wp_super_cache_front_page_notification == 1 ) {
		wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Front page check!', 'wp-super-cache' ), home_url() ), sprintf( __( "WP Super Cache has checked the front page of your blog. Please visit %s if you would like to disable this.", 'wp-super-cache' ) . "\n\n", admin_url( 'options-general.php?page=wpsupercache' ) ) );
	}

	if ( !wp_next_scheduled( 'wp_cache_check_site_hook' ) ) {
		wp_schedule_single_event( time() + 360 , 'wp_cache_check_site_hook' );
		wp_cache_debug( 'scheduled wp_cache_check_site_hook for 360 seconds time.', 2 );
	}
}
add_action( 'wp_cache_check_site_hook', 'wp_cache_check_site' );

function update_cached_mobile_ua_list( $mobile_browsers, $mobile_prefixes = 0, $mobile_groups = 0 ) {
	global $wp_cache_config_file, $wp_cache_mobile_browsers, $wp_cache_mobile_prefixes, $wp_cache_mobile_groups;
	wp_cache_setting( 'wp_cache_mobile_browsers', $mobile_browsers );
	wp_cache_setting( 'wp_cache_mobile_prefixes', $mobile_prefixes );
	if ( is_array( $mobile_groups ) ) {
		$wp_cache_mobile_groups = $mobile_groups;
		wp_cache_replace_line('^ *\$wp_cache_mobile_groups', "\$wp_cache_mobile_groups = '" . implode( ', ', $mobile_groups ) . "';", $wp_cache_config_file);
	}

	return true;
}

function wpsc_update_htaccess() {
	extract( wpsc_get_htaccess_info() ); // $document_root, $apache_root, $home_path, $home_root, $home_root_lc, $inst_root, $wprules, $scrules, $condition_rules, $rules, $gziprules
	wpsc_remove_marker( $home_path.'.htaccess', 'WordPress' ); // remove original WP rules so SuperCache rules go on top
	if( insert_with_markers( $home_path.'.htaccess', 'WPSuperCache', explode( "\n", $rules ) ) && insert_with_markers( $home_path.'.htaccess', 'WordPress', explode( "\n", $wprules ) ) ) {
		return true;
	} else {
		return false;
	}
}

function wpsc_update_htaccess_form( $short_form = true ) {
	global $wpmu_version;

	extract( wpsc_get_htaccess_info() ); // $document_root, $apache_root, $home_path, $home_root, $home_root_lc, $inst_root, $wprules, $scrules, $condition_rules, $rules, $gziprules
	if( !is_writeable_ACLSafe( $home_path . ".htaccess" ) ) {
		echo "
" . __( 'Cannot update .htaccess', 'wp-super-cache' ) . "
" . sprintf( __( 'The file %s.htaccess cannot be modified by the web server. Please correct this using the chmod command or your ftp client.', 'wp-super-cache' ), $home_path ) . "
" . __( 'Refresh this page when the file permissions have been modified.' ) . "
" . sprintf( __( 'Alternatively, you can edit your %s.htaccess file manually and add the following code (before any WordPress rules):', 'wp-super-cache' ), $home_path ) . "
";
		echo "
# BEGIN WPSuperCache\n" . esc_html( $rules ) . "# END WPSuperCache
";
	} else {
		if ( $short_form == false ) {
			echo "
" . sprintf( __( 'To serve static html files your server must have the correct mod_rewrite rules added to a file called %s.htaccess', 'wp-super-cache' ), $home_path ) . " ";
			_e( "You can edit the file yourself. Add the following rules.", 'wp-super-cache' );
			echo __( " Make sure they appear before any existing WordPress rules. ", 'wp-super-cache' ) . "
";
			echo "
";
			echo "
# BEGIN WPSuperCache\n" . esc_html( $rules ) . "# END WPSuperCache
";
			echo "
";
			echo "
" . sprintf( __( 'Rules must be added to %s too:', 'wp-super-cache' ), WP_CONTENT_DIR . "/cache/.htaccess" ) . "
";
			echo "
";
			echo "
# BEGIN supercache\n" . esc_html( $gziprules ) . "# END supercache
";
			echo "
";
		}
		if ( !isset( $wpmu_version ) || $wpmu_version == '' ) {
			echo '
';
			echo '';
			echo '
';
			wp_nonce_field('wp-cache');
			echo "
\n";
		}
	}
}

/*
 * Return LOGGED_IN_COOKIE if it doesn't begin with wordpress_logged_in
 * to avoid having people update their .htaccess file
 */
function wpsc_get_logged_in_cookie() {
	$logged_in_cookie = 'wordpress_logged_in';
	if ( defined( 'LOGGED_IN_COOKIE' ) && substr( constant( 'LOGGED_IN_COOKIE' ), 0, 19 ) != 'wordpress_logged_in' )
		$logged_in_cookie = constant( 'LOGGED_IN_COOKIE' );
	return $logged_in_cookie;
}

function wpsc_get_htaccess_info() {
	global $wp_cache_mobile_enabled, $wp_cache_mobile_prefixes, $wp_cache_mobile_browsers, $wp_cache_disable_utf8;
	if ( isset( $_SERVER[ "PHP_DOCUMENT_ROOT" ] ) ) {
		$document_root = $_SERVER[ "PHP_DOCUMENT_ROOT" ];
		$apache_root = $_SERVER[ "PHP_DOCUMENT_ROOT" ];
	} else {
		$document_root = $_SERVER[ "DOCUMENT_ROOT" ];
		$apache_root = '%{DOCUMENT_ROOT}';
	}
	$content_dir_root = $document_root;
	if ( strpos( $document_root, '/kunden/homepages/' ) === 0 ) {
		// http://wordpress.org/support/topic/plugin-wp-super-cache-how-to-get-mod_rewrite-working-on-1and1-shared-hosting?replies=1
		// On 1and1, PHP's directory structure starts with '/homepages'. The
		// Apache directory structure has an extra '/kunden' before it.
		// Also 1and1 does not support the %{DOCUMENT_ROOT} variable in
		// .htaccess files.
		// This prevents the $inst_root from being calculated correctly and
		// means that the $apache_root is wrong.
		//
		// e.g. This is an example of how Apache and PHP see the directory
		// structure on	1and1:
		// Apache: /kunden/homepages/xx/dxxxxxxxx/htdocs/site1/index.html
		// PHP:           /homepages/xx/dxxxxxxxx/htdocs/site1/index.html
		// Here we fix up the paths to make mode_rewrite work on 1and1 shared hosting.
		$content_dir_root = substr( $content_dir_root, 7 );
		$apache_root = $document_root;
	}
	$home_path = get_home_path();
	$home_root = parse_url(get_bloginfo('url'));
	$home_root = isset( $home_root[ 'path' ] ) ? trailingslashit( $home_root[ 'path' ] ) : '/';
	if (
		$home_root == '/' &&
		$home_path != $_SERVER[ 'DOCUMENT_ROOT' ]
	) {
		$home_path = $_SERVER[ 'DOCUMENT_ROOT' ];
	} elseif (
		$home_root != '/' &&
		$home_path != str_replace( '//', '/', $_SERVER[ 'DOCUMENT_ROOT' ] . $home_root ) &&
		is_dir( $_SERVER[ 'DOCUMENT_ROOT' ] . $home_root )
	) {
		$home_path = str_replace( '//', '/', $_SERVER[ 'DOCUMENT_ROOT' ] . $home_root );
	}

	$home_path = trailingslashit( $home_path );
	$home_root_lc = str_replace( '//', '/', strtolower( $home_root ) );
	$inst_root = str_replace( '//', '/', '/' . trailingslashit( str_replace( $content_dir_root, '', str_replace( '\\', '/', WP_CONTENT_DIR ) ) ) );
	$wprules = implode( "\n", extract_from_markers( $home_path.'.htaccess', 'WordPress' ) );
	$wprules = str_replace( "RewriteEngine On\n", '', $wprules );
	$wprules = str_replace( "RewriteBase $home_root\n", '', $wprules );
	$scrules = implode( "\n", extract_from_markers( $home_path.'.htaccess', 'WPSuperCache' ) );

	if( substr( get_option( 'permalink_structure' ), -1 ) == '/' ) {
		$condition_rules[] = "RewriteCond %{REQUEST_URI} !^.*[^/]$";
		$condition_rules[] = "RewriteCond %{REQUEST_URI} !^.*//.*$";
	}
	$condition_rules[] = "RewriteCond %{REQUEST_METHOD} !POST";
	$condition_rules[] = "RewriteCond %{QUERY_STRING} !.*=.*";
	$condition_rules[] = "RewriteCond %{HTTP:Cookie} !^.*(comment_author_|" . wpsc_get_logged_in_cookie() . "|wp-postpass_).*$";
	$condition_rules[] = "RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\\\"]+ [NC]";
	$condition_rules[] = "RewriteCond %{HTTP:Profile} !^[a-z0-9\\\"]+ [NC]";
	if ( $wp_cache_mobile_enabled ) {
		if ( isset( $wp_cache_mobile_browsers ) && "" != $wp_cache_mobile_browsers )
			$condition_rules[] = "RewriteCond %{HTTP_USER_AGENT} !^.*(" . addcslashes( str_replace( ', ', '|', $wp_cache_mobile_browsers ), ' ' ) . ").* [NC]";
		if ( isset( $wp_cache_mobile_prefixes ) && "" != $wp_cache_mobile_prefixes )
			$condition_rules[] = "RewriteCond %{HTTP_USER_AGENT} !^(" . addcslashes( str_replace( ', ', '|', $wp_cache_mobile_prefixes ), ' ' ) . ").* [NC]";
	}
	$condition_rules = apply_filters( 'supercacherewriteconditions', $condition_rules );

	$rules = "\n";
	$rules .= "RewriteEngine On\n";
	$rules .= "RewriteBase $home_root\n"; // props Chris Messina
	$rules .= "#If you serve pages from behind a proxy you may want to change 'RewriteCond %{HTTPS} on' to something more sensible\n";
	if ( isset( $wp_cache_disable_utf8 ) == false || $wp_cache_disable_utf8 == 0 ) {
		$charset = get_option('blog_charset') == '' ? 'UTF-8' : get_option('blog_charset');
		$rules .= "AddDefaultCharset {$charset}\n";
	}

	$rules .= "CONDITION_RULES";
	$rules .= "RewriteCond %{HTTP:Accept-Encoding} gzip\n";
	$rules .= "RewriteCond %{HTTPS} on\n";
	$rules .= "RewriteCond {$apache_root}{$inst_root}cache/supercache/%{SERVER_NAME}{$home_root_lc}$1/index-https.html.gz -f\n";
	$rules .= "RewriteRule ^(.*) \"{$inst_root}cache/supercache/%{SERVER_NAME}{$home_root_lc}$1/index-https.html.gz\" [L]\n\n";

	$rules .= "CONDITION_RULES";
	$rules .= "RewriteCond %{HTTP:Accept-Encoding} gzip\n";
	$rules .= "RewriteCond %{HTTPS} !on\n";
	$rules .= "RewriteCond {$apache_root}{$inst_root}cache/supercache/%{SERVER_NAME}{$home_root_lc}$1/index.html.gz -f\n";
	$rules .= "RewriteRule ^(.*) \"{$inst_root}cache/supercache/%{SERVER_NAME}{$home_root_lc}$1/index.html.gz\" [L]\n\n";

	$rules .= "CONDITION_RULES";
	$rules .= "RewriteCond %{HTTPS} on\n";
	$rules .= "RewriteCond {$apache_root}{$inst_root}cache/supercache/%{SERVER_NAME}{$home_root_lc}$1/index-https.html -f\n";
	$rules .= "RewriteRule ^(.*) \"{$inst_root}cache/supercache/%{SERVER_NAME}{$home_root_lc}$1/index-https.html\" [L]\n\n";

	$rules .= "CONDITION_RULES";
	$rules .= "RewriteCond %{HTTPS} !on\n";
	$rules .= "RewriteCond {$apache_root}{$inst_root}cache/supercache/%{SERVER_NAME}{$home_root_lc}$1/index.html -f\n";
	$rules .= "RewriteRule ^(.*) \"{$inst_root}cache/supercache/%{SERVER_NAME}{$home_root_lc}$1/index.html\" [L]\n";
	$rules .= "\n";
	$rules = apply_filters( 'supercacherewriterules', $rules );

	$rules = str_replace( "CONDITION_RULES", implode( "\n", $condition_rules ) . "\n", $rules );

	$gziprules =  "\n  \n    ForceType text/html\n    FileETag None\n  \n  AddEncoding gzip .gz\n  AddType text/html .gz\n\n";
	$gziprules .= "\n  SetEnvIfNoCase Request_URI \.gz$ no-gzip\n\n";
	$gziprules .= "\n  Header set Vary \"Accept-Encoding, Cookie\"\n  Header set Cache-Control 'max-age=3, must-revalidate'\n\n";
	$gziprules .= "\n  ExpiresActive On\n  ExpiresByType text/html A3\n\n";
	$gziprules .= "Options -Indexes\n";
	return array( "document_root" => $document_root, "apache_root" => $apache_root, "home_path" => $home_path, "home_root" => $home_root, "home_root_lc" => $home_root_lc, "inst_root" => $inst_root, "wprules" => $wprules, "scrules" => $scrules, "condition_rules" => $condition_rules, "rules" => $rules, "gziprules" => $gziprules );
}

function clear_post_supercache( $post_id ) {
	$dir = get_current_url_supercache_dir( $post_id );
	if ( false == @is_dir( $dir ) )
		return false;

	if ( !function_exists( 'prune_super_cache' ) )
		include_once( 'wp-cache-phase2.php' );

	wp_cache_debug( "clear_post_supercache: deleting files in $dir", 2 );
	if ( get_post_type( $post_id ) != 'page' ) { // don't delete child pages if they exist
		prune_super_cache( $dir, true );
	} else {
		wpsc_delete_files( $dir );
	}
}

function wp_cron_preload_cache() {
	global $wpdb, $wp_cache_preload_interval, $wp_cache_preload_posts, $wp_cache_preload_email_me, $wp_cache_preload_email_volume, $cache_path, $wp_cache_preload_taxonomies;

	if ( get_option( 'preload_cache_stop' ) ) {
		delete_option( 'preload_cache_stop' );
		wp_cache_debug( "wp_cron_preload_cache: preload cancelled", 1 );
		return true;
	}

	if ( !function_exists( 'wp_cache_debug' ) )
		include_once( 'wp-cache-phase1.php' );
	if ( !function_exists( 'prune_super_cache' ) )
		include_once( 'wp-cache-phase2.php' );

	$mutex = $cache_path . "preload_mutex.tmp";
	sleep( 3 + mt_rand( 1, 5 ) );
	if ( @file_exists( $mutex ) ) {
		if ( @filemtime( $mutex ) > ( time() - 600 ) ) {
			wp_cache_debug( "wp_cron_preload_cache: preload mutex found and less than 600 seconds old. Aborting preload.", 1 );
			return true;
		} else {
			wp_cache_debug( "wp_cron_preload_cache: old preload mutex found and deleted. Preload continues.", 1 );
			@unlink( $mutex );
		}
	}
	$fp = @fopen( $mutex, 'w' );
	@fclose( $fp );

	$counter = get_option( 'preload_cache_counter' );
	if ( is_array( $counter ) == false ) {
		wp_cache_debug( "wp_cron_preload_cache: setting up preload for the first time!", 5 );
		$counter = array( 'c' => 0, 't' => time() );
		update_option( 'preload_cache_counter', $counter );
	}
	$c = $counter[ 'c' ];

	update_option( 'preload_cache_counter', array( 'c' => ( $c + 100 ), 't' => time() ) );

	if ( $wp_cache_preload_email_volume == 'none' && $wp_cache_preload_email_me == 1 ) {
		$wp_cache_preload_email_me = 0;
		wp_cache_setting( 'wp_cache_preload_email_me', 0 );
	}
	if ( $wp_cache_preload_email_me && $c == 0 )
		wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Cache Preload Started', 'wp-super-cache' ), home_url(), '' ), ' ' );

	if ( $wp_cache_preload_posts == 'all' || $c < $wp_cache_preload_posts ) {
		wp_cache_debug( "wp_cron_preload_cache: doing taxonomy preload.", 5 );
		$permalink_counter_msg = $cache_path . "preload_permalink.txt";
		if ( isset( $wp_cache_preload_taxonomies ) && $wp_cache_preload_taxonomies ) {
			$taxonomies = apply_filters( 'wp_cache_preload_taxonomies', array( 'post_tag' => 'tag', 'category' => 'category' ) );
			foreach( $taxonomies as $taxonomy => $path ) {
				$taxonomy_filename = $cache_path . "taxonomy_" . $taxonomy . ".txt";
				if ( $c == 0 )
					@unlink( $taxonomy_filename );

				if ( false == @file_exists( $taxonomy_filename ) ) {
					$out = '';
					$records = get_terms( $taxonomy );
					foreach( $records as $term ) {
						$out .= get_term_link( $term ). "\n";
					}
					$fp = fopen( $taxonomy_filename, 'w' );
					if ( $fp ) {
						fwrite( $fp, $out );
						fclose( $fp );
					}
					$details = explode( "\n", $out );
				} else {
					$details = explode( "\n", file_get_contents( $taxonomy_filename ) );
				}
				if ( count( $details ) != 1 && $details[ 0 ] != '' ) {
					$rows = array_splice( $details, 0, 50 );
					if ( $wp_cache_preload_email_me && $wp_cache_preload_email_volume == 'many' )
						wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Refreshing %2$s taxonomy from %3$d to %4$d', 'wp-super-cache' ), home_url(), $taxonomy, $c, ($c+100) ), 'Refreshing: ' . print_r( $rows, 1 ) );
					foreach( (array)$rows as $url ) {
						set_time_limit( 60 );
						if ( $url == '' )
							continue;
						$url_info = parse_url( $url );
						$dir = get_supercache_dir() . $url_info[ 'path' ];
						wp_cache_debug( "wp_cron_preload_cache: delete $dir", 5 );
						prune_super_cache( $dir );
						$fp = @fopen( $permalink_counter_msg, 'w' );
						if ( $fp ) {
							@fwrite( $fp, "$taxonomy: $url" );
							@fclose( $fp );
						}
						wp_remote_get( $url, array('timeout' => 60, 'blocking' => true ) );
						wp_cache_debug( "wp_cron_preload_cache: fetched $url", 5 );
						sleep( 1 );
						if ( @file_exists( $cache_path . "stop_preload.txt" ) ) {
							wp_cache_debug( "wp_cron_preload_cache: cancelling preload. stop_preload.txt found.", 5 );
							@unlink( $mutex );
							@unlink( $cache_path . "stop_preload.txt" );
							@unlink( $taxonomy_filename );
							update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
							if ( $wp_cache_preload_email_me )
								wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Cache Preload Stopped', 'wp-super-cache' ), home_url(), '' ), ' ' );
							return true;
						}
					}
					$fp = fopen( $taxonomy_filename, 'w' );
					if ( $fp ) {
						fwrite( $fp, implode( "\n", $details ) );
						fclose( $fp );
					}
				}
			}
		}
	}

	if ( $wp_cache_preload_posts == 'all' || $c < $wp_cache_preload_posts ) {
		$types = wpsc_get_post_types();
		$posts = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE ( post_type IN ( $types ) ) AND post_status = 'publish' ORDER BY ID DESC LIMIT %d, 100", $c ) );
		wp_cache_debug( "wp_cron_preload_cache: got 100 posts from position $c.", 5 );
	} else {
		wp_cache_debug( "wp_cron_preload_cache: no more posts to get. Limit ($wp_cache_preload_posts) reached.", 5 );
		$posts = false;
	}
	if ( !isset( $wp_cache_preload_email_volume ) )
		$wp_cache_preload_email_volume = 'medium';

	if ( $posts ) {
		if ( get_option( 'show_on_front' ) == 'page' ) {
			$page_on_front = get_option( 'page_on_front' );
			$page_for_posts = get_option( 'page_for_posts' );
		} else {
			$page_on_front = $page_for_posts = 0;
		}
		if ( $wp_cache_preload_email_me && $wp_cache_preload_email_volume == 'many' )
			wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Refreshing posts from %2$d to %3$d', 'wp-super-cache' ), home_url(), $c, ($c+100) ), ' ' );
		$msg = '';
		$count = $c + 1;
		$permalink_counter_msg = $cache_path . "preload_permalink.txt";
		foreach( $posts as $post_id ) {
			set_time_limit( 60 );
			if ( $page_on_front != 0 && ( $post_id == $page_on_front || $post_id == $page_for_posts ) )
				continue;
			clear_post_supercache( $post_id );
			$url = get_permalink( $post_id );
			$fp = @fopen( $permalink_counter_msg, 'w' );
			if ( $fp ) {
				@fwrite( $fp, $count . " " . $url );
				@fclose( $fp );
			}
			if ( @file_exists( $cache_path . "stop_preload.txt" ) ) {
				wp_cache_debug( "wp_cron_preload_cache: cancelling preload. stop_preload.txt found.", 5 );
				@unlink( $mutex );
				@unlink( $cache_path . "stop_preload.txt" );
				update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
				if ( $wp_cache_preload_email_me )
					wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] Cache Preload Stopped', 'wp-super-cache' ), home_url(), '' ), ' ' );
				return true;
			}
			$msg .= "$url\n";
			wp_remote_get( $url, array('timeout' => 60, 'blocking' => true ) );
			wp_cache_debug( "wp_cron_preload_cache: fetched $url", 5 );
			sleep( 1 );
			$count++;
		}
		if ( $wp_cache_preload_email_me && ( $wp_cache_preload_email_volume == 'medium' || $wp_cache_preload_email_volume == 'many' ) )
			wp_mail( get_option( 'admin_email' ), sprintf( __( '[%1$s] %2$d posts refreshed', 'wp-super-cache' ), home_url(), ($c+100) ), __( "Refreshed the following posts:", 'wp-super-cache' ) . "\n$msg" );
		if ( defined( 'DOING_CRON' ) ) {
			wp_cache_debug( "wp_cron_preload_cache: scheduling the next preload in 30 seconds.", 5 );
			wp_schedule_single_event( time() + 30, 'wp_cache_preload_hook' );
		}
	} else {
		$msg = '';
		update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
		if ( (int)$wp_cache_preload_interval && defined( 'DOING_CRON' ) ) {
			if ( $wp_cache_preload_email_me )
				$msg = sprintf( __( 'Scheduling next preload refresh in %d minutes.', 'wp-super-cache' ), (int)$wp_cache_preload_interval );
			wp_cache_debug( "wp_cron_preload_cache: no more posts. scheduling next preload in $wp_cache_preload_interval minutes.", 5 );
			wp_schedule_single_event( time() + ( (int)$wp_cache_preload_interval * 60 ), 'wp_cache_full_preload_hook' );
		}
		global $file_prefix, $cache_max_time;
		if ( $wp_cache_preload_interval > 0 ) {
			$cache_max_time = (int)$wp_cache_preload_interval * 60; // fool the GC into expiring really old files
		} else {
			$cache_max_time = 86400; // fool the GC into expiring really old files
		}
		if ( $wp_cache_preload_email_me )
			wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Cache Preload Completed', 'wp-super-cache' ), home_url() ), __( "Cleaning up old supercache files.", 'wp-super-cache' ) . "\n" . $msg );
		wp_cache_debug( "wp_cron_preload_cache: clean expired cache files older than $cache_max_time seconds.", 5 );
		wp_cache_phase2_clean_expired( $file_prefix, true ); // force cleanup of old files.
	}
	@unlink( $mutex );
}
add_action( 'wp_cache_preload_hook', 'wp_cron_preload_cache' );
add_action( 'wp_cache_full_preload_hook', 'wp_cron_preload_cache' );

function next_preload_message( $hook, $text, $limit = 0 ) {
	global $currently_preloading, $wp_cache_preload_interval;
	if ( $next_preload = wp_next_scheduled( $hook ) ) {
		$next_time = $next_preload - time();
		if ( $limit != 0 && $next_time > $limit )
			return false;
		$h = $m = $s = 0;
		if ( $next_time > 0 ) {
			$m = (int)($next_time / 60);
			$s = $next_time % 60;
			$h = (int)($m / 60); $m = $m % 60;
		}
		if ( $next_time > 0 && $next_time < ( 60 * $wp_cache_preload_interval ) )
			echo '
' . sprintf( $text, $h, $m, $s ) . '
';
		if ( ( $next_preload - time() ) <= 60 )
			$currently_preloading = true;
	}
}

function option_preload_cache_counter( $value ) {
	if ( false == is_array( $value ) ) {
		$ret = array( 'c' => $value, 't' => time(), 'first' => 1 );
		return $ret;
	}

	return $value;
}
add_filter( 'option_preload_cache_counter', 'option_preload_cache_counter' );

function check_up_on_preloading() {
	$value = get_option( 'preload_cache_counter' );
	if ( $value[ 'c' ] > 0 && ( time() - $value[ 't' ] ) > 3600 && false == wp_next_scheduled( 'wp_cache_preload_hook' ) ) {
		if ( is_admin() )
			wp_mail( get_option( 'admin_email' ), sprintf( __( '[%s] Preload may have stalled.', 'wp-super-cache' ), get_bloginfo( 'url' ) ), sprintf( __( "Preload has been restarted.\n%s", 'wp-super-cache' ), admin_url( "options-general.php?page=wpsupercache" ) ) );
		wp_schedule_single_event( time() + 30, 'wp_cache_preload_hook' );
	}
}
add_action( 'init', 'check_up_on_preloading' ); // sometimes preloading stops working. Kickstart it.

function wp_cache_disable_plugin( $delete_config_file = true ) {
	global $wp_rewrite;
	if ( file_exists( ABSPATH . 'wp-config.php') ) {
		$global_config_file = ABSPATH . 'wp-config.php';
	} else {
		$global_config_file = dirname(ABSPATH) . '/wp-config.php';
	}
	$line = 'define(\'WP_CACHE\', true);';
	if ( strpos( file_get_contents( $global_config_file ), $line ) && ( !is_writeable_ACLSafe( $global_config_file ) || !wp_cache_replace_line( 'define *\( *\'WP_CACHE\'', '', $global_config_file ) ) ) {
		wp_die( "Could not remove WP_CACHE define from $global_config_file. Please edit that file and remove the line containing the text 'WP_CACHE'. Then refresh this page." );
	}
	$line = 'define( \'WPCACHEHOME\',';
	if ( strpos( file_get_contents( $global_config_file ), $line ) && ( !is_writeable_ACLSafe( $global_config_file ) || !wp_cache_replace_line( 'define *\( *\'WPCACHEHOME\'', '', $global_config_file ) ) ) {
		wp_die( "Could not remove WPCACHEHOME define from $global_config_file. Please edit that file and remove the line containing the text 'WPCACHEHOME'. Then refresh this page." );
	}

	uninstall_supercache( WP_CONTENT_DIR . '/cache' );
	$file_not_deleted = false;
	if ( @file_exists( WP_CONTENT_DIR . "/advanced-cache.php" ) ) {
		if ( false == @unlink( WP_CONTENT_DIR . "/advanced-cache.php" ) )
			$file_not_deleted[] = 'advanced-cache.php';
	}
	if ( $delete_config_file && @file_exists( WP_CONTENT_DIR . "/wp-cache-config.php" ) ) {
		if ( false == unlink( WP_CONTENT_DIR . "/wp-cache-config.php" ) )
			$file_not_deleted[] = 'wp-cache-config.php';
	}
	if ( $file_not_deleted ) {
		$msg = "
One or more files could not be deleted. These files and directories must be made writeable:
\n 
" . WP_CONTENT_DIR . "
\n";
		$code = "
\n";
		foreach( (array)$file_not_deleted as $filename ) {
			$msg .= "
" . WP_CONTENT_DIR . "/{$filename}
";
			$code .= "
chmod 666 " . WP_CONTENT_DIR . "/{$filename}
\n";
		}
		$code .= "
\n";

		$msg .= "
\n
First try fixing the directory permissions with this command and refresh this page:

chmod 777 " . WP_CONTENT_DIR . "

If you still see this error, you have to fix the permissions on the files themselves and refresh this page again:
 {$code}\n
Don't forgot to fix things later:
chmod 755 " . WP_CONTENT_DIR . "
If you don't know what chmod is use this Google search to find out all about it.
Please refresh this page when the permissions have been modified.
";
		wp_die( $msg );
	}
	extract( wpsc_get_htaccess_info() ); // $document_root, $apache_root, $home_path, $home_root, $home_root_lc, $inst_root, $wprules, $scrules, $condition_rules, $rules, $gziprules
	if ( $scrules != '' && insert_with_markers( $home_path.'.htaccess', 'WPSuperCache', array() ) ) {
		$wp_rewrite->flush_rules();
	} elseif( $scrules != '' ) {
		wp_mail( get_option( 'admin_email' ), __( 'Supercache Uninstall Problems', 'wp-super-cache' ), sprintf( __( "Dear User,\n\nWP Super Cache was removed from your blog but the mod_rewrite rules\nin your .htaccess were not.\n\nPlease edit the following file and remove the code\nbetween 'BEGIN WPSuperCache' and 'END WPSuperCache'. Please backup the file first!\n\n%s\n\nRegards,\nWP Super Cache Plugin\nhttp://wordpress.org/plugins/wp-super-cache/", 'wp-super-cache' ), ABSPATH . '/.htaccess' ) );
	}
}

function uninstall_supercache( $folderPath ) { // from http://www.php.net/manual/en/function.rmdir.php
	if ( trailingslashit( constant( 'ABSPATH' ) ) == trailingslashit( $folderPath ) )
		return false;
	if ( @is_dir ( $folderPath ) ) {
		$dh  = @opendir($folderPath);
		while( false !== ( $value = @readdir( $dh ) ) ) {
			if ( $value != "." && $value != ".." ) {
				$value = $folderPath . "/" . $value;
				if ( @is_dir ( $value ) ) {
					uninstall_supercache( $value );
				} else {
					@unlink( $value );
				}
			}
		}
		return @rmdir( $folderPath );
	} else {
		return false;
	}
}

function supercache_admin_bar_render() {
	global $wp_admin_bar, $wp_cache_not_logged_in;
	if ( !is_user_logged_in() || !$wp_cache_not_logged_in )
		return false;

	if ( function_exists('current_user_can') && false == current_user_can('delete_others_posts') )
		return false;

	$wp_admin_bar->add_menu( array(
				'parent' => '',
				'id' => 'delete-cache',
				'title' => __( 'Delete Cache', 'wp-super-cache' ),
				'meta' => array( 'title' => __( 'Delete cache of the current page', 'wp-super-cache' ) ),
				'href' => wp_nonce_url( admin_url( 'index.php?action=delcachepage&path=' . urlencode( preg_replace( '/[ <>\'\"\r\n\t\(\)]/', '', $_SERVER[ 'REQUEST_URI' ] ) ) ), 'delete-cache' )
				) );
}
add_action( 'wp_before_admin_bar_render', 'supercache_admin_bar_render' );

function wpsc_cancel_preload() {
	global $cache_path;
	$next_preload = wp_next_scheduled( 'wp_cache_preload_hook' );
	if ( $next_preload ) {
		wp_cache_debug( 'wpsc_cancel_preload: unscheduling wp_cache_preload_hook' );
		update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
		wp_unschedule_event( $next_preload, 'wp_cache_preload_hook' );
	}
	$next_preload = wp_next_scheduled( 'wp_cache_full_preload_hook' );
	if ( $next_preload ) {
		update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
		wp_cache_debug( 'wpsc_cancel_preload: unscheduling wp_cache_full_preload_hook' );
		wp_unschedule_event( $next_preload, 'wp_cache_full_preload_hook' );
	}
	wp_cache_debug( 'wpsc_cancel_preload: creating stop_preload.txt' );
	$fp = @fopen( $cache_path . "stop_preload.txt", 'w' );
	@fclose( $fp );
}

function wpsc_enable_preload() {
	global $cache_path;

	@unlink( $cache_path . "preload_mutex.tmp" );
	update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
	wp_schedule_single_event( time() + 10, 'wp_cache_full_preload_hook' );
}

function wpsc_get_post_types() {

	$preload_type_args = apply_filters( 'wpsc_preload_post_types_args', array(
		'public'             => true,
		'publicly_queryable' => true
	) );

	$post_types = (array) apply_filters( 'wpsc_preload_post_types', get_post_types( $preload_type_args, 'names', 'or' ));

	return "'" . join( "', '", array_map( 'esc_sql', $post_types ) ) . "'";
}
function wpsc_post_count() {
	global $wpdb;
	static $count;

	if ( isset( $count ) ) {
		return $count;
	}

	$post_type_list = wpsc_get_post_types();
	$count = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->posts} WHERE post_type IN ( $post_type_list ) AND post_status = 'publish'" );

	return $count;
}
function wpsc_preload_settings( $min_refresh_interval = 'NA' ) {
	global $wp_cache_preload_interval, $wp_cache_preload_on, $wp_cache_preload_taxonomies, $wp_cache_preload_email_me, $wp_cache_preload_email_volume, $wp_cache_preload_posts, $wpdb;

	$return = array();

	if ( isset( $_POST[ 'action' ] ) == false || $_POST[ 'action' ] != 'preload' )
		return $return;

	if ( isset( $_POST[ 'preload_off' ] ) ) {
		wpsc_cancel_preload();
		$return[] = "
" . __( 'Scheduled preloading of cache almost cancelled. It may take up to a minute for it to cancel completely.', 'wp-super-cache' ) . "
";
		return $return;
	} elseif ( isset( $_POST[ 'preload_now' ] ) ) {
		wpsc_enable_preload();
		return $return;
	} 
	
	if ( $min_refresh_interval == 'NA' ) {
		$count = wpsc_post_count();
		if ( $count > 1000 ) {
			$min_refresh_interval = 720;
		} else {
			$min_refresh_interval = 30;
		}
	}
	if ( isset( $_POST[ 'wp_cache_preload_interval' ] ) && ( $_POST[ 'wp_cache_preload_interval' ] == 0 || $_POST[ 'wp_cache_preload_interval' ] >= $min_refresh_interval ) ) {
		// if preload interval changes than unschedule any preload jobs and schedule any new one.
		$_POST[ 'wp_cache_preload_interval' ] = (int)$_POST[ 'wp_cache_preload_interval' ];
		if ( $wp_cache_preload_interval != $_POST[ 'wp_cache_preload_interval' ] ) {
			$next_preload = wp_next_scheduled( 'wp_cache_full_preload_hook' );
			if ( $next_preload ) {
				update_option( 'preload_cache_counter', array( 'c' => 0, 't' => time() ) );
				add_option( 'preload_cache_stop', 1 );
				wp_unschedule_event( $next_preload, 'wp_cache_full_preload_hook' );
				if ( $wp_cache_preload_interval == 0 ) {
					$return[] = "
" . __( 'Scheduled preloading of cache cancelled.', 'wp-super-cache' ) . "
";
				}
				if ( $_POST[ 'wp_cache_preload_interval' ] != 0 )
					wp_schedule_single_event( time() + ( $_POST[ 'wp_cache_preload_interval' ] * 60 ), 'wp_cache_full_preload_hook' );
			}
		}

		$wp_cache_preload_interval = (int)$_POST[ 'wp_cache_preload_interval' ];
		wp_cache_setting( "wp_cache_preload_interval", $wp_cache_preload_interval );
	}

	if ( $_POST[ 'wp_cache_preload_posts' ] == 'all' ) {
		$wp_cache_preload_posts = 'all';
	} else {
		$wp_cache_preload_posts = (int)$_POST[ 'wp_cache_preload_posts' ];
	}
	wp_cache_setting( 'wp_cache_preload_posts', $wp_cache_preload_posts );

	if ( isset( $_POST[ 'wp_cache_preload_email_volume' ] ) && in_array( $_POST[ 'wp_cache_preload_email_volume' ], array( 'none', 'less', 'medium', 'many' ) ) ) {
		$wp_cache_preload_email_volume = $_POST[ 'wp_cache_preload_email_volume' ];
	} else {
		$wp_cache_preload_email_volume = 'none';
	}
	wp_cache_setting( 'wp_cache_preload_email_volume', $wp_cache_preload_email_volume );

	if ( $wp_cache_preload_email_volume == 'none' )
		wp_cache_setting( 'wp_cache_preload_email_me', 0 );
	else
		wp_cache_setting( 'wp_cache_preload_email_me', 1 );

	if ( isset( $_POST[ 'wp_cache_preload_taxonomies' ] ) ) {
		$wp_cache_preload_taxonomies = 1;
	} else {
		$wp_cache_preload_taxonomies = 0;
	}
	wp_cache_setting( 'wp_cache_preload_taxonomies', $wp_cache_preload_taxonomies );

	if ( isset( $_POST[ 'wp_cache_preload_on' ] ) ) {
		$wp_cache_preload_on = 1;
	} else {
		$wp_cache_preload_on = 0;
	}
	wp_cache_setting( 'wp_cache_preload_on', $wp_cache_preload_on );

	return $return;
}

function wpsc_is_preloading() {
	if ( wp_next_scheduled( 'wp_cache_preload_hook' ) || wp_next_scheduled( 'wp_cache_full_preload_hook' ) ) { 
		return true;
	} else {
		return false;
	}
}

function wpsc_set_default_gc( $force = false ) {
	global $cache_path, $wp_cache_shutdown_gc, $cache_schedule_type;

	if ( isset( $wp_cache_shutdown_gc ) && $wp_cache_shutdown_gc == 1 ) {
		return false;
	}

	if ( $force ) {
		unset( $cache_schedule_type );
		$timestamp = wp_next_scheduled( 'wp_cache_gc' );
		if ( $timestamp ) {
			wp_unschedule_event( $timestamp, 'wp_cache_gc' );
		}
	}

	// set up garbage collection with some default settings
	if ( false == isset( $cache_schedule_type ) && false == wp_next_scheduled( 'wp_cache_gc' ) ) {
		$cache_schedule_type     = 'interval';
		$cache_time_interval     = 600;
		$cache_max_time          = 1800;
		$cache_schedule_interval = 'hourly';
		$cache_gc_email_me       = 0;
		wp_cache_setting( 'cache_schedule_type', $cache_schedule_type );
		wp_cache_setting( 'cache_time_interval', $cache_time_interval );
		wp_cache_setting( 'cache_max_time', $cache_max_time );
		wp_cache_setting( 'cache_schedule_interval', $cache_schedule_interval );
		wp_cache_setting( 'cache_gc_email_me', $cache_gc_email_me );

		wp_schedule_single_event( time() + 600, 'wp_cache_gc' );
	}

	return true;

}

function add_mod_rewrite_rules() {
	return update_mod_rewrite_rules();
}

function remove_mod_rewrite_rules() {
	return update_mod_rewrite_rules( false );
}

function update_mod_rewrite_rules( $add_rules = true ) {
	global $cache_path, $update_mod_rewrite_rules_error;

	$update_mod_rewrite_rules_error = false;

	if ( defined( "DO_NOT_UPDATE_HTACCESS" ) ) {
		$update_mod_rewrite_rules_error = ".htaccess update disabled by admin: DO_NOT_UPDATE_HTACCESS defined";
		return false;
	}

	if ( ! function_exists( 'get_home_path' ) ) {
		include_once( ABSPATH . 'wp-admin/includes/file.php' ); // get_home_path()
		include_once( ABSPATH . 'wp-admin/includes/misc.php' ); // extract_from_markers()
	}
	$home_path = trailingslashit( get_home_path() );
	$home_root = parse_url( get_bloginfo( 'url' ) );
	$home_root = isset( $home_root[ 'path' ] ) ? trailingslashit( $home_root[ 'path' ] ) : '/';
	if (
		$home_root == '/' &&
		$home_path != $_SERVER[ 'DOCUMENT_ROOT' ]
	) {
		$home_path = $_SERVER[ 'DOCUMENT_ROOT' ];
	} elseif (
		$home_root != '/' &&
		$home_path != str_replace( '//', '/', $_SERVER[ 'DOCUMENT_ROOT' ] . $home_root ) &&
		is_dir( $_SERVER[ 'DOCUMENT_ROOT' ] . $home_root )
	) {
		$home_path = str_replace( '//', '/', $_SERVER[ 'DOCUMENT_ROOT' ] . $home_root );
	}
	$home_path = trailingslashit( $home_path );

	if ( ! file_exists( $home_path . ".htaccess" ) ) {
		$update_mod_rewrite_rules_error = ".htaccess not found: {$home_path}.htaccess";
		return false;
	}

	$generated_rules = wpsc_get_htaccess_info();

	if ( $add_rules ) {
		$rules = $generated_rules[ 'rules' ];
	}  else {
		$rules = '';
	}

	$existing_rules = implode( "\n", extract_from_markers( $home_path . '.htaccess', 'WPSuperCache' ) );

	if ( $existing_rules == $rules ) {
		$update_mod_rewrite_rules_error = "rules have not changed";
		return true;
	}

	if ( $generated_rules[ 'wprules' ] == '' ) {
		$update_mod_rewrite_rules_error = "WordPress rules empty";
		return false;
	}

	$url = trailingslashit( get_bloginfo( 'url' ) );
	$original_page = wp_remote_get( $url, array( 'timeout' => 60, 'blocking' => true ) );
	if ( is_wp_error( $original_page ) ) {
		$update_mod_rewrite_rules_error = "Problem loading page";
		return false;
	}

	$backup_filename = $cache_path . 'htaccess.' . mt_rand() . ".php";
	$backup_file_contents = file_get_contents( $home_path . '.htaccess' );
	file_put_contents( $backup_filename, "<" . "?php die(); ?" . ">" . $backup_file_contents );
	$existing_gzip_rules = implode( "\n", extract_from_markers( $cache_path . '.htaccess', 'supercache' ) );
	if ( $existing_gzip_rules != $generated_rules[ 'gziprules' ] ) {
		insert_with_markers( $cache_path . '.htaccess', 'supercache', explode( "\n", $generated_rules[ 'gziprules' ] ) );
	}
	$wprules = extract_from_markers( $home_path . '.htaccess', 'WordPress' );
	wpsc_remove_marker( $home_path . '.htaccess', 'WordPress' ); // remove original WP rules so SuperCache rules go on top
	if ( insert_with_markers( $home_path . '.htaccess', 'WPSuperCache', explode( "\n", $rules ) ) && insert_with_markers( $home_path . '.htaccess', 'WordPress', $wprules ) ) {
		$new_page = wp_remote_get( $url, array( 'timeout' => 60, 'blocking' => true ) );
		$restore_backup = false;
		if ( is_wp_error( $new_page ) ) {
			$restore_backup = true;
			$update_mod_rewrite_rules_error = "Error testing page with new .htaccess rules: " . $new_page->get_error_message() . ".";
			wp_cache_debug( 'update_mod_rewrite_rules: failed to update rules. error fetching second page: ' . $new_page->get_error_message() );
		} elseif ( $new_page[ 'body' ] != $original_page[ 'body' ] ) {
			$restore_backup = true;
			$update_mod_rewrite_rules_error = "Page test failed as pages did not match with new .htaccess rules.";
			wp_cache_debug( 'update_mod_rewrite_rules: failed to update rules. page test failed as pages did not match. Files dumped in ' . $cache_path . ' for inspection.' );
			wp_cache_debug( 'update_mod_rewrite_rules: original page: 1-' . md5( $original_page[ 'body' ] ) . '.txt' );
			wp_cache_debug( 'update_mod_rewrite_rules: new page: 1-' . md5( $new_page[ 'body' ] ) . '.txt' );
			file_put_contents( $cache_path . '1-' . md5( $original_page[ 'body' ] ) . '.txt', $original_page[ 'body' ] );
			file_put_contents( $cache_path . '2-' . md5( $new_page[ 'body' ] ) . '.txt', $new_page[ 'body' ] );
		}

		if ( $restore_backup ) {
			global $wp_cache_debug;
			file_put_contents( $home_path . '.htaccess', $backup_file_contents );
			unlink( $backup_filename );
			if ( $wp_cache_debug ) {
				$update_mod_rewrite_rules_error .= "
See debug log for further details";
			} else {
				$update_mod_rewrite_rules_error .= "
Enable debug log on Debugging page for further details and try again";
			}

			return false;
		}
	} else {
		file_put_contents( $home_path . '.htaccess', $backup_file_contents );
		unlink( $backup_filename );
		$update_mod_rewrite_rules_error = "problem inserting rules in .htaccess and original .htaccess restored";
		return false;
	}

	return true;
}

function wpsc_timestamp_cache_update( $type, $permalink ) {
	wp_cache_setting( 'wpsc_last_post_update', time() );
}
add_action( 'gc_cache', 'wpsc_timestamp_cache_update', 10, 2 );