phpinfo-wp / includes / class-object-cache.php

class-object-cache.php in phpinfo() WP – Site Health, PHP Compatibility & Server Audit 7.2.5, at includes/class-object-cache.php

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1	<?php
2	defined('ABSPATH') or die('Unauthorized Access');
3
4	class Phpinfo_WP_Object_Cache {
5
6	private static function _pro(): bool { return Phpinfo_WP_License::is_valid(); }
7
8	public static function has_dropin(): bool {
9	return file_exists(WP_CONTENT_DIR . '/object-cache.php');
10	}
11
12	public static function is_redis_extension_loaded(): bool {
13	return extension_loaded('redis');
14	}
15
16	public static function is_memcached_extension_loaded(): bool {
17	return extension_loaded('memcached') \|\| extension_loaded('memcache');
18	}
19
20	public static function active_type(): ?string {
21	if (!self::has_dropin()) return null;
22
23	$dropin = file_get_contents(WP_CONTENT_DIR . '/object-cache.php');
24	if (stripos($dropin, 'redis') !== false) {
25	return 'redis';
26	}
27	if (stripos($dropin, 'memcache') !== false) {
28	return 'memcached';
29	}
30	return 'unknown';
31	}
32
33	public static function status(): ?array {
34	if (!self::_pro()) return null;
35
36	$type = self::active_type();
37	if (!$type) return null;
38
39	$status = [
40	'type' => $type,
41	'hit_rate' => null,
42	'hits' => 0,
43	'misses' => 0,
44	'memory_used' => 0,
45	'memory_total' => 0,
46	'memory_pct' => 0,
47	'evictions' => 0,
48	'keys' => 0,
49	'connection' => 'unknown',
50	];
51
52	global $wp_object_cache;
53
54	// Try to get stats from the drop-in object
55	if (is_object($wp_object_cache)) {
56	// Some drop-ins store connection info here
57	if ($type === 'redis') {
58	if (method_exists($wp_object_cache, 'redis_status')) {
59	// Try to infer from redis Object Cache dropin
60	if (isset($wp_object_cache->redis_client)) {
61	try {
62	$info = $wp_object_cache->redis_client->info();
63	if ($info) {
64	$status['memory_used'] = $info['used_memory'] ?? 0;
65	$status['memory_total'] = $info['maxmemory'] ?? 0;
66	$status['evictions'] = $info['evicted_keys'] ?? 0;
67	if (isset($info['db0'])) {
68	preg_match('/keys=(\d+)/', $info['db0'], $matches);
69	$status['keys'] = isset($matches[1]) ? (int)$matches[1] : 0;
70	}
71	$status['hits'] = $info['keyspace_hits'] ?? 0;
72	$status['misses'] = $info['keyspace_misses'] ?? 0;
73	}
74	} catch (Exception $e) {}
75	}
76	}
77
78	// Connection type
79	if (defined('WP_REDIS_SCHEME') && WP_REDIS_SCHEME === 'unix') {
80	$status['connection'] = 'UNIX Socket (Fast)';
81	} elseif (defined('WP_REDIS_HOST')) {
82	$status['connection'] = 'TCP ' . WP_REDIS_HOST . ':' . (defined('WP_REDIS_PORT') ? WP_REDIS_PORT : '6379');
83	}
84	} elseif ($type === 'memcached') {
85	if (method_exists($wp_object_cache, 'get_stats')) {
86	$stats = $wp_object_cache->get_stats();
87	if (!empty($stats) && is_array($stats)) {
88	$first = reset($stats); // usually keyed by server
89	if (is_array($first)) {
90	$status['hits'] = $first['get_hits'] ?? 0;
91	$status['misses'] = $first['get_misses'] ?? 0;
92	$status['memory_used'] = $first['bytes'] ?? 0;
93	$status['memory_total'] = $first['limit_maxbytes'] ?? 0;
94	$status['evictions'] = $first['evictions'] ?? 0;
95	$status['keys'] = $first['curr_items'] ?? 0;
96	}
97	}
98	}
99	$status['connection'] = 'TCP (Standard)';
100	}
101
102	// General WP Cache stats fallback
103	if ($status['hits'] === 0 && isset($wp_object_cache->cache_hits)) {
104	$status['hits'] = $wp_object_cache->cache_hits;
105	$status['misses'] = $wp_object_cache->cache_misses;
106	}
107	}
108
109	if (($status['hits'] + $status['misses']) > 0) {
110	$status['hit_rate'] = round($status['hits'] / ($status['hits'] + $status['misses']) * 100, 2);
111	}
112
113	if ($status['memory_total'] > 0) {
114	$status['memory_pct'] = round($status['memory_used'] / $status['memory_total'] * 100, 1);
115	}
116
117	return $status;
118	}
119
120	public static function flush(): bool {
121	if (!self::_pro()) return false;
122	if (function_exists('wp_cache_flush')) {
123	return wp_cache_flush();
124	}
125	return false;
126	}
127
128	public static function format_bytes(int $bytes): string {
129	if ($bytes >= 1048576) return round($bytes / 1048576, 2) . ' MB';
130	if ($bytes >= 1024) return round($bytes / 1024, 1) . ' KB';
131	return $bytes . ' B';
132	}
133
134	public static function hit_rate_class(float $rate): string {
135	if ($rate >= 90) return 'grade-a';
136	if ($rate >= 70) return 'grade-b';
137	if ($rate >= 50) return 'grade-c';
138	return 'grade-f';
139	}
140	}
141