installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/Cache_Base.php

@@ -0,0 +1,226 @@
+<?php
+namespace W3TC;
+
+/**
+ * Base cache class
+ */
+
+/**
+ * class Cache_Base
+ */
+class Cache_Base {
+	/*
+     * Blog id
+     *
+     * @var integer
+     */
+	protected  $_blog_id = 0;
+
+	/**
+	 * To separate the caching for different modules
+	 *
+	 * @var string
+	 */
+	protected $_module = '';
+
+	/**
+	 * Host
+	 *
+	 * @var string
+	 */
+	protected $_host = '';
+
+	/**
+	 * Host
+	 *
+	 * @var int
+	 */
+	protected $_instance_id = 0;
+
+	/*
+     * If we are going to return expired data when some other process
+     * is working on new data calculation
+     *
+     * @var boolean
+     */
+	protected $_use_expired_data = false;
+
+	/**
+	 * Constructor
+	 *
+	 * @param array   $config
+	 */
+	public function __construct( $config = array() ) {
+		$this->_blog_id = $config['blog_id'];
+		$this->_use_expired_data = isset( $config['use_expired_data'] )?$config['use_expired_data']:false;
+		$this->_module = isset( $config['module'] ) ? $config['module'] : 'default';
+		$this->_host = isset( $config['host'] ) ? $config['host'] : '';
+		$this->_instance_id = isset( $config['instance_id'] ) ? $config['instance_id'] : 0;
+	}
+	/**
+	 * Adds data
+	 *
+	 * @abstract
+	 * @param string  $key
+	 * @param mixed   $data
+	 * @param integer $expire
+	 * @param string  $group  Used to differentiate between groups of cache values
+	 * @return boolean
+	 */
+	function add( $key, &$data, $expire = 0, $group = '' ) {
+		return false;
+	}
+
+	/**
+	 * Sets data
+	 *
+	 * @abstract
+	 * @param string  $key
+	 * @param mixed   $data
+	 * @param integer $expire
+	 * @param string  $group  Used to differentiate between groups of cache values
+	 * @return boolean
+	 */
+	function set( $key, $data, $expire = 0, $group = '' ) {
+		return false;
+	}
+
+	/**
+	 * Returns data
+	 *
+	 * @param string  $key
+	 * @param string  $group Used to differentiate between groups of cache values
+	 * @return mixed
+	 */
+	function get( $key, $group = '' ) {
+		list( $data, $has_old ) = $this->get_with_old( $key, $group );
+		return $data;
+	}
+
+	/**
+	 * Return primary data and if old exists
+	 *
+	 * @abstract
+	 * @param string  $key
+	 * @param string  $group Used to differentiate between groups of cache values
+	 * @return array|mixed
+	 */
+	function get_with_old( $key, $group = '' ) {
+		return array( null, false );
+	}
+
+	/**
+	 * Alias for get for minify cache
+	 *
+	 * @param string  $key
+	 * @param string  $group Used to differentiate between groups of cache values
+	 * @return mixed
+	 */
+	function fetch( $key, $group = '' ) {
+		return $this->get( $key, $group = '' );
+	}
+
+	/**
+	 * Replaces data
+	 *
+	 * @abstract
+	 * @param string  $key
+	 * @param mixed   $data
+	 * @param integer $expire
+	 * @param string  $group  Used to differentiate between groups of cache values
+	 * @return boolean
+	 */
+	function replace( $key, &$data, $expire = 0, $group = '' ) {
+		return false;
+	}
+
+	/**
+	 * Deletes data
+	 *
+	 * @abstract
+	 * @param string  $key
+	 * @param string  $group Used to differentiate between groups of cache values
+	 * @return boolean
+	 */
+	function delete( $key, $group = '' ) {
+		return false;
+	}
+
+	/**
+	 * Deletes primary data and old data
+	 *
+	 * @abstract
+	 * @param string  $key
+	 * @return boolean
+	 */
+	function hard_delete( $key, $group = '' ) {
+		return false;
+	}
+
+	/**
+	 * Flushes all data
+	 *
+	 * @abstract
+	 * @param string  $group Used to differentiate between groups of cache values
+	 * @return boolean
+	 */
+	function flush( $group = '' ) {
+		return false;
+	}
+
+	/**
+	 * Checks if engine can function properly in this environment
+	 *
+	 * @return bool
+	 */
+	public function available() {
+		return true;
+	}
+
+	/**
+	 * Constructs key version key
+	 *
+	 * @param unknown $group
+	 * @return string
+	 */
+	protected function _get_key_version_key( $group = '' ) {
+		return sprintf( 'w3tc_%d_%d_%s_%s_key_version',
+			$this->_instance_id, $this->_blog_id,
+			$this->_module, $group );
+	}
+
+	/**
+	 * Constructs item key
+	 *
+	 * @param unknown $name
+	 * @return string
+	 */
+	public function get_item_key( $name ) {
+		$key = sprintf( 'w3tc_%d_%s_%d_%s_%s',
+			$this->_instance_id, $this->_host, $this->_blog_id,
+			$this->_module, $name );
+		return $key;
+	}
+
+
+	/**
+	 * Use key as a counter and add integet value to it
+	 */
+	public function counter_add( $key, $value ) {
+		return false;
+	}
+
+	/**
+	 * Use key as a counter and add integet value to it
+	 */
+	public function counter_set( $key, $value ) {
+		return false;
+	}
+
+	/**
+	 * Get counter's value
+	 */
+	public function counter_get( $key ) {
+		return false;
+	}
+}