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msd2/wordpress/wp-content/plugins/cachify/inc/cachify_memcached.class.php

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+<?php
+
+
+/* Quit */
+defined('ABSPATH') OR exit;
+
+
+/**
+* Cachify_MEMCACHED
+*/
+
+final class Cachify_MEMCACHED {
+
+
+	/**
+	* Memcached-Object
+	*
+	* @since  2.0.7
+	* @var    object
+	*/
+
+	private static $_memcached;
+
+
+	/**
+	* Availability check
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*
+	* @return  boolean  true/false  TRUE when installed
+	*/
+
+	public static function is_available()
+	{
+		return class_exists('Memcached') && isset($_SERVER['SERVER_SOFTWARE']) && strpos(strtolower($_SERVER['SERVER_SOFTWARE']), 'nginx') !== false;
+	}
+
+
+	/**
+	* Caching method as string
+	*
+	* @since   2.1.2
+	* @change  2.1.2
+	*
+	* @return  string  Caching method
+	*/
+
+	public static function stringify‎_method() {
+		return 'Memcached';
+	}
+
+
+	/**
+	* Speicherung im Cache
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*
+	* @param   string   $hash      Hash des Eintrags
+	* @param   string   $data      Inhalt des Eintrags
+	* @param   integer  $lifetime  Lebensdauer des Eintrags
+	*/
+
+	public static function store_item($hash, $data, $lifetime)
+	{
+		/* Empty? */
+		if ( empty($data) ) {
+			wp_die('MEMCACHE add item: Empty input.');
+		}
+
+		/* Server connect */
+		if ( ! self::_connect_server() ) {
+			return;
+		}
+
+		/* Add item */
+		self::$_memcached->set(
+			self::_file_path(),
+			$data . self::_cache_signatur(),
+			$lifetime
+		);
+	}
+
+
+	/**
+	* Lesen aus dem Cache
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*
+	* @param   string  $hash  Hash des Eintrags
+	* @return  mixed   $diff  Wert des Eintrags
+	*/
+
+	public static function get_item($hash)
+	{
+		/* Server connect */
+		if ( ! self::_connect_server() ) {
+			return;
+		}
+
+		/* Get item */
+		return self::$_memcached->get(
+			self::_file_path()
+		);
+	}
+
+
+	/**
+	* Entfernung aus dem Cache
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*
+	* @param   string  $hash  Hash des Eintrags
+	* @param   string  $url   URL des Eintrags [optional]
+	*/
+
+	public static function delete_item($hash, $url = '')
+	{
+		/* Server connect */
+		if ( ! self::_connect_server() ) {
+			return;
+		}
+
+		/* Delete */
+		self::$_memcached->delete(
+			self::_file_path($url)
+		);
+	}
+
+
+	/**
+	* Leerung des Cache
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*/
+
+	public static function clear_cache()
+	{
+		/* Server connect */
+		if ( ! self::_connect_server() ) {
+			return;
+		}
+
+		/* Flush */
+		@self::$_memcached->flush();
+	}
+
+
+	/**
+	* Ausgabe des Cache
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*/
+
+	public static function print_cache()
+	{
+		return;
+	}
+
+
+	/**
+	* Ermittlung der Cache-Größe
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*
+	* @return  mixed  $diff  Cache-Größe
+	*/
+
+	public static function get_stats()
+	{
+		/* Server connect */
+		if ( ! self::_connect_server() ) {
+			wp_die('MEMCACHE: Not enabled.');
+		}
+
+		/* Infos */
+		$data = self::$_memcached->getStats();
+
+		/* No stats? */
+		if ( empty($data) ) {
+			return NULL;
+		}
+
+		/* Get first key */
+		$data = $data[key($data)];
+
+		/* Leer */
+		if ( empty($data['bytes']) ) {
+			return NULL;
+		}
+
+		return $data['bytes'];
+	}
+
+
+	/**
+	* Generierung der Signatur
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*
+	* @return  string  $diff  Signatur als String
+	*/
+
+	private static function _cache_signatur()
+	{
+		return sprintf(
+			"\n\n<!-- %s\n%s @ %s -->",
+			'Cachify | http://cachify.de',
+			'Memcached',
+			date_i18n(
+				'd.m.Y H:i:s',
+				current_time('timestamp')
+			)
+		);
+	}
+
+
+	/**
+	* Pfad der Cache-Datei
+	*
+	* @since   2.0.7
+	* @change  2.0.7
+	*
+	* @param   string  $path  Request-URI oder Permalink [optional]
+	* @return  string  $diff  Pfad zur Cache-Datei
+	*/
+
+	private static function _file_path($path = NULL)
+	{
+		return trailingslashit(
+			sprintf(
+				'%s%s',
+				$_SERVER['HTTP_HOST'],
+				parse_url(
+					( $path ? $path : $_SERVER['REQUEST_URI'] ),
+					PHP_URL_PATH
+				)
+			)
+		);
+	}
+
+
+	/**
+	* Connect to Memcached server
+	*
+	* @since   2.0.7
+	* @change  2.1.8
+	*
+	* @hook    array  cachify_memcached_servers  Array with memcached servers
+	*
+	* @return  boolean  true/false  TRUE bei Erfolg
+	*/
+
+	private static function _connect_server()
+	{
+		/* Not enabled? */
+		if ( ! self::is_available() ) {
+			return false;
+		}
+
+		/* Already connected */
+		if ( is_object(self::$_memcached) ) {
+			return true;
+		}
+
+		/* Init */
+		self::$_memcached = new Memcached();
+
+		/* Set options */
+		if ( defined('HHVM_VERSION') ) {
+			self::$_memcached->setOption( Memcached::OPT_COMPRESSION, false );
+			self::$_memcached->setOption( Memcached::OPT_BUFFER_WRITES, true );
+			self::$_memcached->setOption( Memcached::OPT_BINARY_PROTOCOL, true );
+		} else {
+			self::$_memcached->setOptions(
+				array(
+					Memcached::OPT_COMPRESSION => false,
+					Memcached::OPT_BUFFER_WRITES => true,
+					Memcached::OPT_BINARY_PROTOCOL => true
+				)
+			);
+		}
+
+		/* Connect */
+		self::$_memcached->addServers(
+			(array)apply_filters(
+				'cachify_memcached_servers',
+				array(
+					array(
+						'127.0.0.1',
+						11211
+					)
+				)
+			)
+		);
+
+		return true;
+	}
+}