polylang / include / cache.php

cache.php in Polylang 2.0.1, at include/cache.php

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1	<?php
2
3	/**
4	* an extremely simple non persistent cache system
5	* not as fast as using directly an array but more readable
6	*
7	* @since 1.7
8	*/
9	class PLL_Cache {
10	protected $blog_id, $cache;
11
12	/**
13	* constructor
14	*
15	* @since 1.7
16	*/
17	public function __construct() {
18	$this->blog_id = get_current_blog_id();
19	add_action( 'switch_blog', array( $this, 'switch_blog' ) );
20	}
21
22	/**
23	* called when switching blog
24	*
25	* @since 1.7
26	*
27	* @param int $new_blog
28	*/
29	public function switch_blog( $new_blog ) {
30	$this->blog_id = $new_blog;
31	}
32
33	/**
34	* add a value in cache
35	*
36	* @since 1.7
37	*
38	* @param string $key
39	* @param mixed $data
40	*/
41	public function set( $key, $data ) {
42	$this->cache[ $this->blog_id ][ $key ] = $data;
43	}
44
45	/**
46	* get value from cache
47	*
48	* @since 1.7
49	*
50	* @param string $key
51	* @return mixed $data
52	*/
53	public function get( $key ) {
54	return isset( $this->cache[ $this->blog_id ][ $key ] ) ? $this->cache[ $this->blog_id ][ $key ] : false;
55	}
56
57	/**
58	* clean the cache (for this blog only)
59	*
60	* @since 1.7
61	*/
62	public function clean( $key = '' ) {
63	if ( empty( $key ) ) {
64	unset( $this->cache[ $this->blog_id ] );
65	}
66	else {
67	unset( $this->cache[ $this->blog_id ][ $key ] );
68	}
69	}
70	}
71