wpforo / classes / RamCache.php

RamCache.php in wpForo Forum 3.0.8, at classes/RamCache.php

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1	<?php
2
3	namespace wpforo\classes;
4
5	// Exit if accessed directly
6	if( ! defined( 'ABSPATH' ) ) exit;
7
8	class RamCache {
9	/**
10	* @var array
11	*/
12	private static $ram_cache = [];
13
14	/**
15	* wpForoRamCache constructor.
16	*/
17	public function __construct() {
18	$this->reset();
19	}
20
21	/**
22	* set empty array to static $ram_cache
23	*
24	* @param mixed $key
25	*
26	* @return void
27	*/
28	public function reset( $key = null ) {
29	if( is_null( $key ) ) {
30	self::$ram_cache = [];
31	} else {
32	unset( self::$ram_cache[ $this->fix_key( $key ) ] );
33	}
34	}
35
36	/**
37	* @param mixed $key
38	*
39	* @return string
40	*/
41	private function fix_key( $key ) {
42	if( ! is_scalar( $key ) ) $key = wp_json_encode( $key );
43
44	return md5( $key );
45	}
46
47	/**
48	* checking if this data already cached
49	*
50	* @param mixed $key unique key
51	*
52	* @return bool
53	*/
54	public function exists( $key ) {
55	return array_key_exists( $this->fix_key( $key ), self::$ram_cache );
56	}
57
58	/**
59	* return already cached data
60	*
61	* @param mixed $key unique key
62	*
63	* @return mixed
64	*/
65	public function get( $key ) {
66	if( $this->exists( $key ) ) {
67	return self::$ram_cache[ $this->fix_key( $key ) ];
68	} else {
69	return null;
70	}
71	}
72
73	/**
74	* storing a cache of provided data
75	*
76	* @param mixed $key unique key
77	* @param mixed $data
78	*/
79	public function set( $key, $data ) {
80	self::$ram_cache[ $this->fix_key( $key ) ] = $data;
81	}
82
83	/**
84	* call callable function and return function returned value
85	* and store in static property for next call
86	*
87	* @param callable $func
88	* @param mixed ...$args [optional] call_user_func parameters
89	*
90	* @return mixed
91	*/
92	public function call_user_func( $func, ...$args ) {
93	if( ! is_callable( $func, false, $callable_name ) ) return null;
94	$key = [ $callable_name, $args ];
95	if( $this->exists( $key ) ) return $this->get( $key );
96	$data = call_user_func_array( $func, $args );
97	$this->set( $key, $data );
98
99	return $data;
100	}
101	}
102