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usr/src/litespeed-wp-plugin/4.6/litespeed-cache/src/_[ Not.Writable ]

File://usr/src/litespeed-wp-plugin/4.6/litespeed-cache/src/object.lib.php

<?php
/**
 * LiteSpeed Object Cache Library
 *
 * @since  1.8
 */
defined( 'WPINC' ) || exit;

/**
 * Handle exception
 */
if ( ! function_exists( 'litespeed_exception_handler' ) ) {
	function litespeed_exception_handler( $errno, $errstr, $errfile, $errline ) {
		throw new \ErrorException($errstr, 0, $errno, $errfile, $errline);
	}
}

require_once __DIR__ . '/object-cache.cls.php';

/**
 * Sets up Object Cache Global and assigns it.
 *
 * @since 1.8
 */
function wp_cache_init() {
	$GLOBALS['wp_object_cache'] = WP_Object_Cache::get_instance();
}

/**
 * Retrieves the cache contents from the cache by key and group.
 *
 * @since 1.8
 */
function wp_cache_get( $key, $group = '', $force = false, &$found = null ) {
	global $wp_object_cache;

	return $wp_object_cache->get( $key, $group, $force, $found );
}

/**
 * Saves the data to the cache.
 *
 * @since 1.8
 */
function wp_cache_set( $key, $data, $group = '', $expire = 0 ) {
	global $wp_object_cache;

	return $wp_object_cache->set( $key, $data, $group, $expire );
}

/**
 * Adds data to the cache, if the cache key doesn't already exist.
 *
 * @since 1.8
 */
function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
	global $wp_object_cache;

	return $wp_object_cache->add( $key, $data, $group, $expire );
}

/**
 * Replaces the contents of the cache with new data.
 *
 * @since 1.8
 */
function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) {
	global $wp_object_cache;

	return $wp_object_cache->replace( $key, $data, $group, $expire );
}

/**
 * Increment numeric cache item's value
 *
 * @since 1.8
 */
function wp_cache_incr( $key, $offset = 1, $group = '' ) {
	global $wp_object_cache;

	return $wp_object_cache->incr_desr( $key, $offset, $group );
}

/**
 * Decrements numeric cache item's value.
 *
 * @since 1.8
 */
function wp_cache_decr( $key, $offset = 1, $group = '' ) {
	global $wp_object_cache;

	return $wp_object_cache->incr_desr( $key, $offset, $group, false );
}

/**
 * Removes the cache contents matching key and group.
 *
 * @since 1.8
 */
function wp_cache_delete( $key, $group = '' ) {
	global $wp_object_cache;

	return $wp_object_cache->delete( $key, $group );
}

/**
 * Removes all cache items.
 *
 * @since 1.8
 */
function wp_cache_flush() {
	global $wp_object_cache;

	return $wp_object_cache->flush();
}

/**
 * Adds a group or set of groups to the list of global groups.
 *
 * @since 1.8
 */
function wp_cache_add_global_groups( $groups ) {
	global $wp_object_cache;

	$wp_object_cache->add_global_groups( $groups );
}

/**
 * Adds a group or set of groups to the list of non-persistent groups.
 *
 * @since 1.8
 */
function wp_cache_add_non_persistent_groups( $groups ) {
	global $wp_object_cache;

	$wp_object_cache->add_non_persistent_groups( $groups );
}

/**
 * Switches the internal blog ID.
 *
 * This changes the blog id used to create keys in blog specific groups.
 *
 * @since 1.8
 *
 * @see WP_Object_Cache::switch_to_blog()
 * @global WP_Object_Cache $wp_object_cache Object cache global instance.
 *
 * @param int $blog_id Site ID.
 */
function wp_cache_switch_to_blog( $blog_id ) {
	global $wp_object_cache;

	$wp_object_cache->switch_to_blog( $blog_id );
}

/**
 * Closes the cache.
 *
 * @since 1.8
 */
function wp_cache_close() {
	return true;
}



class WP_Object_Cache {
	protected static $_instance;

	private $_object_cache;

	private $_cache = array();
	private $_cache_404 = array();

	private $cache_total = 0;
	private $count_hit_incall = 0;
	private $count_hit = 0;
	private $count_miss_incall = 0;
	private $count_miss = 0;
	private $count_set = 0;

	private $blog_prefix;

	/**
	 * Init
	 *
	 * @since  1.8
	 */
	public function __construct() {
		$this->_object_cache = \LiteSpeed\Object_Cache::cls();

		$this->multisite = is_multisite();
		$this->blog_prefix = $this->multisite ? get_current_blog_id() . ':' : '';

		/**
		 * Fix multiple instance using same oc issue
		 * @since  1.8.2
		 */
		! defined( 'LSOC_PREFIX' ) && define( 'LSOC_PREFIX', substr( md5( __FILE__ ), -5 ) );
	}

	/**
	 * Output debug info
	 *
	 * @since  1.8
	 * @access public
	 */
	public function debug() {
		$log = ' [total] ' . $this->cache_total
			. ' [hit_incall] ' . $this->count_hit_incall
			. ' [hit] ' . $this->count_hit
			. ' [miss_incall] ' . $this->count_miss_incall
			. ' [miss] ' . $this->count_miss
			. ' [set] ' . $this->count_set;

		return $log;
	}

	/**
	 * Get from cache
	 *
	 * @since  1.8
	 * @access public
	 */
	public function get( $key, $group = 'default', $force = false, &$found = null ) {
		$final_key = $this->_key( $key, $group );
// error_log('');
// error_log("oc: get \t\t\t[key] " . $final_key . ( $force ? "\t\t\t [forced] " : '' ) );
		$found = false;
		$found_in_oc = false;
		$cache_val = false;
		if ( array_key_exists( $final_key, $this->_cache ) && ! $force ) {
			$found = true;
			$cache_val = $this->_cache[ $final_key ];
			$this->count_hit_incall ++;
		}
		elseif ( ! array_key_exists( $final_key, $this->_cache_404 ) && ! $this->_object_cache->is_non_persistent( $group ) ) {
			$v = $this->_object_cache->get( $final_key );

			if ( $v !== null ) {
				$v = @maybe_unserialize( $v );
			}

			// To be compatible with false val
			if ( is_array( $v ) && array_key_exists( 'data', $v ) ) {
				$this->count_hit ++;
				$found = true;
				$found_in_oc = true;
				$cache_val = $v[ 'data' ];
			}
			else { // Can't find key, cache it to 404
// error_log("oc: add404\t\t\t[key] " . $final_key );
				$this->_cache_404[ $final_key ] = 1;
				$this->count_miss ++;
			}
		}
		else {
			$this->count_miss_incall ++;
		}

		if ( is_object( $cache_val ) ) {
			$cache_val = clone $cache_val;
		}

		// If not found but has `Store Transients` cfg on, still need to follow WP's get_transient() logic
		if ( ! $found && $this->_object_cache->store_transients( $group ) ) {
			$cache_val = $this->_transient_get( $key, $group );
			if ( $cache_val ) {
				$found = true; // $found not used for now (v1.8.3)
			}
		}

		if ( $found_in_oc ) {
			$this->_cache[ $final_key ] = $cache_val;
		}

		$this->cache_total ++;

		return $cache_val;
	}

	/**
	 * Set to cache
	 *
	 * @since  1.8
	 * @access public
	 */
	public function set( $key, $data, $group = 'default', $expire = 0 ) {
		$final_key = $this->_key( $key, $group );

		if ( is_object( $data ) ) {
			$data = clone $data;
		}
// error_log("oc: set \t\t\t[key] " . $final_key );
		$this->_cache[ $final_key ] = $data;

		if( array_key_exists( $final_key, $this->_cache_404 ) ) {
// error_log("oc: unset404\t\t\t[key] " . $final_key );
			unset( $this->_cache_404[ $final_key ] );
		}

		if ( ! $this->_object_cache->is_non_persistent( $group ) ) {
			$this->_object_cache->set( $final_key, serialize( array( 'data' => $data ) ), $expire );
			$this->count_set ++;
		}

		if ( $this->_object_cache->store_transients( $group ) ) {
			$this->_transient_set( $key, $data, $group, $expire );
		}

		return true;
	}

	/**
	 * Adds data to the cache if it doesn't already exist.
	 *
	 * @since 1.8
	 * @access public
	 */
	public function add( $key, $data, $group = 'default', $expire = 0 ) {
		if ( wp_suspend_cache_addition() ) {
			return false;
		}

		$final_key = $this->_key( $key, $group );

		if ( array_key_exists( $final_key, $this->_cache ) ) {
			return false;
		}

		return $this->set( $key, $data, $group, $expire );
	}

	/**
	 * Replace cache if the cache key exists.
	 *
	 * @since 1.8
	 * @access public
	 */
	public function replace( $key, $data, $group = 'default', $expire = 0 ) {
		$final_key = $this->_key( $key, $group );

		if ( ! array_key_exists( $final_key, $this->_cache ) ) {
			return false;
		}

		return $this->set( $key, $data, $group, $expire );
	}

	/**
	 * Increments numeric cache item's value.
	 *
	 * @since 1.8
	 * @access public
	 */
	public function incr_desr( $key, $offset = 1, $group = 'default', $incr = true ) {
		$cache_val = $this->get( $key, $group );

		if ( $cache_val === false ) {
			return false;
		}

		if ( ! is_numeric( $cache_val ) ) {
			$cache_val = 0;
		}

		$offset = (int) $offset;

		if ( $incr ) {
			$cache_val += $offset;
		}
		else {
			$cache_val -= $offset;
		}

		if ( $cache_val < 0 ) {
			$cache_val = 0;
		}

		$this->set( $key, $cache_val, $group );

		return $cache_val;
	}

	/**
	 * Delete cache
	 *
	 * @since 1.8
	 * @access public
	 */
	public function delete( $key, $group = 'default' ) {

		$final_key = $this->_key( $key, $group );

		if ( $this->_object_cache->store_transients( $group ) ) {
			$this->_transient_del( $key, $group );
		}

		if ( array_key_exists( $final_key, $this->_cache ) ) {
			unset( $this->_cache[ $final_key ] );
		}
// error_log("oc: delete \t\t\t[key] " . $final_key );

		if ( $this->_object_cache->is_non_persistent( $group ) ) {
			return false;
		}

		return $this->_object_cache->delete( $final_key );
	}

	/**
	 * Clear all cached data
	 *
	 * @since 1.8
	 * @access public
	 */
	public function flush() {
		$this->_cache = array();
		$this->_cache_404 = array();
// error_log("oc: flush " );

		$this->_object_cache->flush();

		return true;
	}

	/**
	 * Add global groups
	 *
	 * @since 1.8
	 * @access public
	 */
	public function add_global_groups( $groups ) {
		$this->_object_cache->add_global_groups( $groups );
	}

	/**
	 * Add non persistent groups
	 *
	 * @since 1.8
	 * @access public
	 */
	public function add_non_persistent_groups( $groups ) {
		$this->_object_cache->add_non_persistent_groups( $groups );
	}

	/**
	 * Get the final key
	 *
	 * @since 1.8
	 * @access private
	 */
	private function _key( $key, $group = 'default' ) {
		$prefix = $this->_object_cache->is_global( $group ) ? '' : $this->blog_prefix;

		return LSOC_PREFIX . $prefix . $group . '.' . $key;
	}

	/**
	 * Switches the internal blog ID.
	 *
	 * This changes the blog ID used to create keys in blog specific groups.
	 *
	 * @since 1.8
	 *
	 * @param int $blog_id Blog ID.
	 */
	public function switch_to_blog( $blog_id ) {
		$blog_id = (int) $blog_id;
		$this->blog_prefix = $this->multisite ? $blog_id . ':' : '';
	}

	/**
	 * Get transient from wp table
	 *
	 * @since 1.8.3
	 * @access private
	 * @see `wp-includes/option.php` function `get_transient`/`set_site_transient`
	 */
	private function _transient_get( $transient, $group ) {
		if ( $group == 'transient' ) {
			/**** Ori WP func start ****/
			$transient_option = '_transient_' . $transient;
			if ( ! wp_installing() ) {
				// If option is not in alloptions, it is not autoloaded and thus has a timeout
				$alloptions = wp_load_alloptions();
				if ( !isset( $alloptions[$transient_option] ) ) {
					$transient_timeout = '_transient_timeout_' . $transient;
					$timeout = get_option( $transient_timeout );
					if ( false !== $timeout && $timeout < time() ) {
						delete_option( $transient_option  );
						delete_option( $transient_timeout );
						$value = false;
					}
				}
			}

			if ( ! isset( $value ) )
				$value = get_option( $transient_option );
			/**** Ori WP func end ****/
		}
		elseif ( $group == 'site-transient' ) {
			/**** Ori WP func start ****/
			$no_timeout = array('update_core', 'update_plugins', 'update_themes');
			$transient_option = '_site_transient_' . $transient;
			if ( ! in_array( $transient, $no_timeout ) ) {
				$transient_timeout = '_site_transient_timeout_' . $transient;
				$timeout = get_site_option( $transient_timeout );
				if ( false !== $timeout && $timeout < time() ) {
					delete_site_option( $transient_option  );
					delete_site_option( $transient_timeout );
					$value = false;
				}
			}

			if ( ! isset( $value ) )
				$value = get_site_option( $transient_option );
			/**** Ori WP func end ****/
		}
		else {
			$value = false;
		}

		return $value;
	}

	/**
	 * Set transient to WP table
	 *
	 * @since 1.8.3
	 * @access private
	 * @see `wp-includes/option.php` function `set_transient`/`set_site_transient`
	 */
	private function _transient_set( $transient, $value, $group, $expiration ) {
		if ( $group == 'transient' ) {
			/**** Ori WP func start ****/
			$transient_timeout = '_transient_timeout_' . $transient;
			$transient_option = '_transient_' . $transient;
			if ( false === get_option( $transient_option ) ) {
				$autoload = 'yes';
				if ( $expiration ) {
					$autoload = 'no';
					add_option( $transient_timeout, time() + $expiration, '', 'no' );
				}
				$result = add_option( $transient_option, $value, '', $autoload );
			} else {
				// If expiration is requested, but the transient has no timeout option,
				// delete, then re-create transient rather than update.
				$update = true;
				if ( $expiration ) {
					if ( false === get_option( $transient_timeout ) ) {
						delete_option( $transient_option );
						add_option( $transient_timeout, time() + $expiration, '', 'no' );
						$result = add_option( $transient_option, $value, '', 'no' );
						$update = false;
					} else {
						update_option( $transient_timeout, time() + $expiration );
					}
				}
				if ( $update ) {
					$result = update_option( $transient_option, $value );
				}
			}
			/**** Ori WP func end ****/
		}
		elseif ( $group == 'site-transient' ) {
			/**** Ori WP func start ****/
			$transient_timeout = '_site_transient_timeout_' . $transient;
			$option = '_site_transient_' . $transient;
			if ( false === get_site_option( $option ) ) {
				if ( $expiration )
					add_site_option( $transient_timeout, time() + $expiration );
				$result = add_site_option( $option, $value );
			} else {
				if ( $expiration )
					update_site_option( $transient_timeout, time() + $expiration );
				$result = update_site_option( $option, $value );
			}
			/**** Ori WP func end ****/
		}
		else {
			$result = null;
		}

		return $result;
	}

	/**
	 * Delete transient from WP table
	 *
	 * @since 1.8.3
	 * @access private
	 * @see `wp-includes/option.php` function `delete_transient`/`delete_site_transient`
	 */
	private function _transient_del( $transient, $group ) {
		if ( $group == 'transient' ) {
			/**** Ori WP func start ****/
			$option_timeout = '_transient_timeout_' . $transient;
			$option = '_transient_' . $transient;
			$result = delete_option( $option );
			if ( $result )
				delete_option( $option_timeout );
			/**** Ori WP func end ****/
		}
		elseif ( $group == 'site-transient' ) {
			/**** Ori WP func start ****/
			$option_timeout = '_site_transient_timeout_' . $transient;
			$option = '_site_transient_' . $transient;
			$result = delete_site_option( $option );
			if ( $result )
				delete_site_option( $option_timeout );
			/**** Ori WP func end ****/
		}
	}

	/**
	 * Get the current instance object.
	 *
	 * @since 1.8
	 * @access public
	 */
	public static function get_instance() {
		if ( ! isset( self::$_instance ) ) {
			self::$_instance = new self();
		}

		return self::$_instance;
	}
}

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