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<?php declare(strict_types = 1);
/**
* Object cache collector.
*
* @package query-monitor
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* @extends QM_DataCollector<QM_Data_Cache>
*/
class QM_Collector_Cache extends QM_DataCollector {
public $id = 'cache';
public function get_storage(): QM_Data {
return new QM_Data_Cache();
}
/**
* @return void
*/
public function process() {
global $wp_object_cache;
$this->data->has_object_cache = (bool) wp_using_ext_object_cache();
$this->data->cache_hit_percentage = 0;
if ( is_object( $wp_object_cache ) ) {
$object_vars = get_object_vars( $wp_object_cache );
if ( array_key_exists( 'cache_hits', $object_vars ) ) {
$this->data->stats['cache_hits'] = (int) $object_vars['cache_hits'];
}
if ( array_key_exists( 'cache_misses', $object_vars ) ) {
$this->data->stats['cache_misses'] = (int) $object_vars['cache_misses'];
}
$stats = array();
if ( method_exists( $wp_object_cache, 'getStats' ) ) {
$stats = $wp_object_cache->getStats();
} elseif ( array_key_exists( 'stats', $object_vars ) && is_array( $object_vars['stats'] ) ) {
$stats = $object_vars['stats'];
} elseif ( function_exists( 'wp_cache_get_stats' ) ) {
$stats = wp_cache_get_stats();
}
if ( ! empty( $stats ) ) {
if ( is_array( $stats ) && ! isset( $stats['get_hits'] ) && 1 === count( $stats ) ) {
$first_server = reset( $stats );
if ( isset( $first_server['get_hits'] ) ) {
$stats = $first_server;
}
}
foreach ( $stats as $key => $value ) {
if ( ! is_scalar( $value ) ) {
continue;
}
if ( ! is_string( $key ) ) {
continue;
}
$this->data->stats[ $key ] = $value;
}
}
if ( ! isset( $this->data->stats['cache_hits'] ) ) {
if ( isset( $this->data->stats['get_hits'] ) ) {
$this->data->stats['cache_hits'] = (int) $this->data->stats['get_hits'];
}
}
if ( ! isset( $this->data->stats['cache_misses'] ) ) {
if ( isset( $this->data->stats['get_misses'] ) ) {
$this->data->stats['cache_misses'] = (int) $this->data->stats['get_misses'];
}
}
}
if ( ! empty( $this->data->stats['cache_hits'] ) ) {
$total = $this->data->stats['cache_hits'];
if ( ! empty( $this->data->stats['cache_misses'] ) ) {
$total += $this->data->stats['cache_misses'];
}
$this->data->cache_hit_percentage = ( 100 / $total ) * $this->data->stats['cache_hits'];
}
$this->data->display_hit_rate_warning = ( 100 === $this->data->cache_hit_percentage );
if ( function_exists( 'extension_loaded' ) ) {
$this->data->object_cache_extensions = array_map( 'extension_loaded', array(
'Afterburner' => 'afterburner',
'Relay' => 'relay',
'Redis' => 'redis',
'Memcached' => 'memcached',
'Memcache' => 'memcache',
'APCu' => 'apcu',
) );
$this->data->opcode_cache_extensions = array_map( 'extension_loaded', array(
'APC' => 'APC',
'Zend OPcache' => 'Zend OPcache',
) );
} else {
$this->data->object_cache_extensions = array();
$this->data->opcode_cache_extensions = array();
}
$this->data->has_opcode_cache = array_filter( $this->data->opcode_cache_extensions ) ? true : false;
}
}
/**
* @param array<string, QM_Collector> $collectors
* @param QueryMonitor $qm
* @return array<string, QM_Collector>
*/
function register_qm_collector_cache( array $collectors, QueryMonitor $qm ) {
$collectors['cache'] = new QM_Collector_Cache();
return $collectors;
}
add_filter( 'qm/collectors', 'register_qm_collector_cache', 20, 2 );
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