polylang / include / cache.php

cache.php in Polylang 2.8.4, 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	protected $blog_id, $cache;
14
15	/**
16	* Constructor
17	*
18	* @since 1.7
19	*/
20	public function __construct() {
21	$this->blog_id = get_current_blog_id();
22	add_action( 'switch_blog', array( $this, 'switch_blog' ) );
23	}
24
25	/**
26	* Called when switching blog
27	*
28	* @since 1.7
29	*
30	* @param int $new_blog
31	*/
32	public function switch_blog( $new_blog ) {
33	$this->blog_id = $new_blog;
34	}
35
36	/**
37	* Add a value in cache
38	*
39	* @since 1.7
40	*
41	* @param string $key
42	* @param mixed $data
43	*/
44	public function set( $key, $data ) {
45	$this->cache[ $this->blog_id ][ $key ] = $data;
46	}
47
48	/**
49	* Get value from cache
50	*
51	* @since 1.7
52	*
53	* @param string $key
54	* @return mixed $data
55	*/
56	public function get( $key ) {
57	return isset( $this->cache[ $this->blog_id ][ $key ] ) ? $this->cache[ $this->blog_id ][ $key ] : false;
58	}
59
60	/**
61	* Clean the cache (for this blog only)
62	*
63	* @since 1.7
64	*
65	* @param string $key
66	*/
67	public function clean( $key = '' ) {
68	if ( empty( $key ) ) {
69	unset( $this->cache[ $this->blog_id ] );
70	}
71	else {
72	unset( $this->cache[ $this->blog_id ][ $key ] );
73	}
74	}
75	}
76