polylang / include / cache.php

cache.php in Polylang 3.3.3, at include/cache.php

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1	<?php
2	/**
3	* @package Polylang
4	*/
5
6	/**
7	* An extremely simple non persistent cache system
8	* not as fast as using directly an array but more readable
9	*
10	* @since 1.7
11	*/
12	class PLL_Cache {
13	/**
14	* Current site id.
15	*
16	* @var int
17	*/
18	protected $blog_id;
19
20	/**
21	* The cache container.
22	*
23	* @var array
24	*/
25	protected $cache = array();
26
27	/**
28	* Constructor
29	*
30	* @since 1.7
31	*/
32	public function __construct() {
33	$this->blog_id = get_current_blog_id();
34	add_action( 'switch_blog', array( $this, 'switch_blog' ) );
35	}
36
37	/**
38	* Called when switching blog
39	*
40	* @since 1.7
41	*
42	* @param int $new_blog
43	* @return void
44	*/
45	public function switch_blog( $new_blog ) {
46	$this->blog_id = $new_blog;
47	}
48
49	/**
50	* Add a value in cache
51	*
52	* @since 1.7
53	*
54	* @param string $key
55	* @param mixed $data
56	* @return void
57	*/
58	public function set( $key, $data ) {
59	$this->cache[ $this->blog_id ][ $key ] = $data;
60	}
61
62	/**
63	* Get value from cache
64	*
65	* @since 1.7
66	*
67	* @param string $key
68	* @return mixed $data
69	*/
70	public function get( $key ) {
71	return isset( $this->cache[ $this->blog_id ][ $key ] ) ? $this->cache[ $this->blog_id ][ $key ] : false;
72	}
73
74	/**
75	* Clean the cache (for this blog only)
76	*
77	* @since 1.7
78	*
79	* @param string $key
80	* @return void
81	*/
82	public function clean( $key = '' ) {
83	if ( empty( $key ) ) {
84	unset( $this->cache[ $this->blog_id ] );
85	}
86	else {
87	unset( $this->cache[ $this->blog_id ][ $key ] );
88	}
89	}
90	}
91