powered-cache / includes / classes / ObjectCache.php

ObjectCache.php in Powered Cache – Caching and Optimization for WordPress – Easily Improve PageSpeed & Web Vitals Score 3.7.2, at includes/classes/ObjectCache.php

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1	<?php
2	/**
3	* Object Cache related functionalities
4	*
5	* @package PoweredCache
6	*/
7
8	namespace PoweredCache;
9
10	// Exit if accessed directly
11	if ( ! defined( 'ABSPATH' ) ) {
12	exit;
13	}
14
15	/**
16	* Class ObjectCache
17	*/
18	class ObjectCache {
19
20	/**
21	* Return an instance of the current class
22	*
23	* @return ObjectCache
24	* @since 1.0
25	*/
26	public static function factory() {
27
28	static $instance;
29
30	if ( ! $instance ) {
31	$instance = new self();
32	$instance->setup();
33	}
34
35	return $instance;
36	}
37
38
39	/**
40	* Setup hooks
41	*
42	* @since 1.0
43	*/
44	public function setup() {
45	$settings = \PoweredCache\Utils\get_settings();
46
47	if ( 'off' === $settings['object_cache'] ) {
48	return;
49	}
50
51	add_action( 'admin_bar_menu', array( $this, 'admin_bar_menu' ) );
52	add_action( 'admin_post_powered_cache_purge_object_cache', array( $this, 'purge_object_cache' ) );
53
54	add_action( 'added_option', array( $this, 'maybe_clear_alloptions_cache' ) );
55	add_action( 'updated_option', array( $this, 'maybe_clear_alloptions_cache' ) );
56	add_action( 'deleted_option', array( $this, 'maybe_clear_alloptions_cache' ) );
57	}
58
59
60	/**
61	* Add purge button on admin bar
62	*
63	* @param object $wp_admin_bar Admin bar object
64	*
65	* @since 1.0
66	*/
67	public function admin_bar_menu( $wp_admin_bar ) {
68	if ( is_multisite() && ! current_user_can( 'manage_network' ) ) {
69	return;
70	}
71
72	if ( ! current_user_can( 'manage_options' ) ) {
73	return;
74	}
75
76	$wp_admin_bar->add_menu(
77	array(
78	'id' => 'object-cache-purge',
79	'title' => __( 'Purge Object Cache', 'powered-cache' ),
80	'href' => wp_nonce_url( admin_url( 'admin-post.php?action=powered_cache_purge_object_cache' ), 'powered_cache_purge_object_cache' ),
81	'parent' => 'powered-cache',
82	)
83	);
84	}
85
86
87	/**
88	* Purge object cache
89	*
90	* @since 1.0
91	*/
92	public function purge_object_cache() {
93	if ( ! wp_verify_nonce( $_GET['_wpnonce'], 'powered_cache_purge_object_cache' ) ) { // phpcs:ignore
94	wp_nonce_ays( '' );
95	}
96
97	if ( is_multisite() && ! current_user_can( 'manage_network' ) ) {
98	$redirect_url = add_query_arg( 'pc_action', 'flush_object_cache_err_permission', wp_get_referer() );
99	wp_safe_redirect( esc_url_raw( $redirect_url ) );
100	exit;
101	}
102
103	if ( ! current_user_can( 'manage_options' ) ) {
104	$redirect_url = add_query_arg( 'pc_action', 'flush_object_cache_err_permission', wp_get_referer() );
105	wp_safe_redirect( esc_url_raw( $redirect_url ) );
106	exit;
107	}
108
109	if ( function_exists( 'wp_cache_flush' ) ) {
110	wp_cache_flush();
111	}
112
113	$redirect_url = add_query_arg( 'pc_action', 'flush_object_cache', wp_get_referer() );
114	wp_safe_redirect( esc_url_raw( $redirect_url ) );
115	exit;
116	}
117
118
119	/**
120	* Fix a race condition in alloptions caching
121	*
122	* @param string $option option name
123	*
124	* @see https://github.com/skopco/powered-cache/issues/47
125	* @see https://core.trac.wordpress.org/ticket/31245
126	*
127	*
128	* Ported from https://core.trac.wordpress.org/ticket/31245#comment:57
129	* @since 1.2.4
130	*/
131	public function maybe_clear_alloptions_cache( $option ) {
132	if ( ! wp_installing() ) {
133	$alloptions = wp_load_alloptions(); // alloptions should be cached at this point
134
135	if ( isset( $alloptions[ $option ] ) ) { // only if option is among alloptions
136	wp_cache_delete( 'alloptions', 'options' );
137	}
138	}
139	}
140
141	}
142