<?php
/**
* @package Polylang
*/
/**
* An extremely simple non persistent cache system.
*
* @since 1.7
*/
class PLL_Cache {
/**
* Current site id.
*
* @var int
*/
protected $blog_id;
/**
* The cache container.
*
* @var array
*/
protected $cache = array();
/**
* Constructor.
*
* @since 1.7
*/
public function __construct() {
$this->blog_id = get_current_blog_id();
add_action( 'switch_blog', array( $this, 'switch_blog' ) );
}
/**
* Called when switching blog.
*
* @since 1.7
*
* @param int $new_blog_id New blog ID.
* @return void
*/
public function switch_blog( $new_blog_id ) {
$this->blog_id = $new_blog_id;
}
/**
* Add a value in cache.
*
* @since 1.7
*
* @param string $key Cache key.
* @param mixed $data The value to add to the cache.
* @return void
*/
public function set( $key, $data ) {
$this->cache[ $this->blog_id ][ $key ] = $data;
}
/**
* Get value from cache.
*
* @since 1.7
*
* @param string $key Cache key.
* @return mixed
*/
public function get( $key ) {
return isset( $this->cache[ $this->blog_id ][ $key ] ) ? $this->cache[ $this->blog_id ][ $key ] : false;
}
/**
* Clean the cache (for this blog only).
*
* @since 1.7
*
* @param string $key Cache key.
* @return void
*/
public function clean( $key = '' ) {
if ( empty( $key ) ) {
unset( $this->cache[ $this->blog_id ] );
} else {
unset( $this->cache[ $this->blog_id ][ $key ] );
}
}
}