103 lines
2.1 KiB
PHP
103 lines
2.1 KiB
PHP
<?php
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/**
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* Class WPML_Non_Persistent_Cache
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*
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* Implements non-persistent cache based on an array. Suitable to cache objects during single page load.
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*/
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class WPML_Non_Persistent_Cache {
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/**
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* @var array Cached objects.
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*/
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private static $cache = array();
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/**
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* Retrieves the data contents from the cache, if it exists.
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*
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* @param string $key Cache key.
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* @param string $group Cache group.
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* @param bool $found Whether the key was found in the cache (passed by reference).
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* Disambiguates a return of false, a storable value.
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*
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* @return mixed|bool
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*/
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public static function get( $key, $group = 'default', &$found = null ) {
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if (
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isset( self::$cache[ $group ] ) &&
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( isset( self::$cache[ $group ][ $key ] ) || array_key_exists( $key, self::$cache[ $group ] ) )
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) {
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$found = true;
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return self::$cache[ $group ][ $key ];
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}
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$found = false;
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return false;
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}
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/**
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* Sets the data contents into the cache.
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*
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* @param string $key Cache key.
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* @param mixed $data Data to store in cache.
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* @param string $group Cache group.
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*
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* @return bool
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*/
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public static function set( $key, $data, $group = 'default' ) {
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if ( is_object( $data ) ) {
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$data = clone $data;
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}
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self::$cache[ $group ][ $key ] = $data;
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return true;
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}
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/**
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* Executes callback function and caches its result.
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*
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* @param string $key Cache key.
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* @param callable $callback Callback function.
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* @param string $group Cache group.
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*
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* @return bool
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*/
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public static function execute_and_cache( $key, $callback, $group = 'default' ) {
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$data = self::get( $key, $group, $found );
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if ( ! $found ) {
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$data = $callback();
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self::set( $key, $data, $group );
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}
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return $data;
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}
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/**
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* Flush cache.
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*
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* @return bool
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*/
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public static function flush() {
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self::$cache = array();
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return true;
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}
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/**
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* Flush cache group.
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*
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* @param array|string $groups Cache group name.
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*
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* @return bool
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*/
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public static function flush_group( $groups = 'default' ) {
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$groups = (array) $groups;
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foreach ( $groups as $group ) {
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unset( self::$cache[ $group ] );
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}
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return true;
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}
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}
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