%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
if ( !defined( 'DEVM' ) ) {
die( 'Forbidden' );
}
class Devm_Cache {
/**
* The actual cache
* @var array
*/
protected static $cache = [];
protected static $min_free_memory = 10485760;
protected static $not_found_value;
protected static $hits = 0;
protected static $misses = 0;
protected static $freed = 0;
protected static function get_memory_limit() {
$memory_limit = ini_get( 'memory_limit' );
if ( $memory_limit === '-1' ) { // This happens in WP CLI
return 256 * 1024 * 1024;
}
switch ( substr( $memory_limit, -1 ) ) {
case 'M':return intval( $memory_limit ) * 1024 * 1024;
case 'K':return intval( $memory_limit ) * 1024;
case 'G':return intval( $memory_limit ) * 1024 * 1024 * 1024;
default:return intval( $memory_limit ) * 1024 * 1024;
}
}
protected static function memory_exceeded() {
return memory_get_usage( false ) >= self::get_memory_limit() - self::$min_free_memory;
}
/**
* @internal
*/
public static function init_static() {
self::$not_found_value = new Devm_Cache_Not_Found_Exception();
foreach ( [
'query' => true,
'plugins_loaded' => true,
'wp_get_object_terms' => true,
'created_term' => true,
'wp_upgrade' => true,
'added_option' => true,
'updated_option' => true,
'deleted_option' => true,
'wp_after_admin_bar_render' => true,
'http_response' => true,
'oembed_result' => true,
'customize_post_value_set' => true,
'customize_save_after' => true,
'customize_render_panel' => true,
'customize_render_control' => true,
'customize_render_section' => true,
'role_has_cap' => true,
'user_has_cap' => true,
'theme_page_templates' => true,
'pre_get_users' => true,
'request' => true,
'send_headers' => true,
'updated_usermeta' => true,
'added_usermeta' => true,
'image_memory_limit' => true,
'upload_dir' => true,
'wp_head' => true,
'wp_footer' => true,
'wp' => true,
'wp_init' => true,
'devm_init' => true,
'init' => true,
'updated_postmeta' => true,
'deleted_postmeta' => true,
'setted_transient' => true,
'registered_post_type' => true,
'wp_count_posts' => true,
'wp_count_attachments' => true,
'after_delete_post' => true,
'post_updated' => true,
'wp_insert_post' => true,
'deleted_post' => true,
'clean_post_cache' => true,
'wp_restore_post_revision' => true,
'wp_delete_post_revision' => true,
'get_term' => true,
'edited_term_taxonomies' => true,
'deleted_term_taxonomy' => true,
'edited_terms' => true,
'created_term' => true,
'clean_term_cache' => true,
'edited_term_taxonomy' => true,
'switch_theme' => true,
'wp_get_update_data' => true,
'clean_user_cache' => true,
'process_text_diff_html' => true,
] as $hook => $tmp ) {
add_filter( $hook, [ __CLASS__, 'free_memory' ], 1 );
}
foreach ( [
'switch_blog' => true,
'upgrader_post_install' => true,
'upgrader_process_complete' => true,
'switch_theme' => true,
] as $hook => $tmp ) {
add_filter( $hook, [ __CLASS__, 'clear' ], 1 );
}
}
public static function is_enabled() {
return true;
}
/**
* @param mixed $dummy
* @return mixed
*/
public static function free_memory( $dummy = null ) {
while ( self::memory_exceeded() && !empty( self::$cache ) ) {
reset( self::$cache );
$key = key( self::$cache );
unset( self::$cache[$key] );
}
++self::$freed;
return $dummy;
}
/**
* @param $keys
* @param $value
* @param $keys_delimiter
*/
public static function set( $keys, $value, $keys_delimiter = '/' ) {
if ( !self::is_enabled() ) {
return;
}
self::free_memory();
devm_array_key_set( $keys, $value, self::$cache, $keys_delimiter );
self::free_memory();
}
/**
* Unset key from cache
* @param $keys
* @param $keys_delimiter
*/
public static function del( $keys, $keys_delimiter = '/' ) {
devm_array_key_unset( $keys, self::$cache, $keys_delimiter );
self::free_memory();
}
/**
* @param $keys
* @param $keys_delimiter
* @return mixed
* @throws Devm_Cache_Not_Found_Exception
*/
public static function get( $keys, $keys_delimiter = '/' ) {
$keys = (string) $keys;
$keys_arr = explode( $keys_delimiter, $keys );
$key = $keys_arr;
$key = array_shift( $key );
if ( $key === '' || $key === null ) {
trigger_error( 'First key must not be empty', E_USER_ERROR );
}
self::free_memory();
$value = devm_array_key_get( $keys, self::$cache, self::$not_found_value, $keys_delimiter );
self::free_memory();
if ( $value === self::$not_found_value ) {
++self::$misses;
throw new Devm_Cache_Not_Found_Exception();
} else {
++self::$hits;
return $value;
}
}
/**
* Empty the cache
* @param mixed $dummy When method is used in add_filter()
* @return mixed
*/
public static function clear( $dummy = null ) {
self::$cache = [];
/**
* This method is used in add_filter() so to not break anything return filter value
*/
return $dummy;
}
/**
* Debug information
* <?php add_action('admin_footer', function(){ Devm_Cache::stats(); });
* @since 2.4.17
*/
public static function stats() {
echo '<div style="z-index: 10000; position: relative; background: #fff; padding: 15px;">';
echo '<p>';
echo '<strong>Cache Hits:</strong> ' . esc_html( self::$hits ) . '<br />';
echo '<strong>Cache Misses:</strong> ' . esc_html( self::$misses ) . '<br />';
echo '<strong>Cache Freed:</strong> ' . esc_html( self::$freed ) . '<br />';
echo '<strong>PHP Memory Peak Usage:</strong> ' . devm_human_bytes( memory_get_peak_usage( false ) ) . '<br />';
echo '</p>';
echo '<ul>';
foreach ( self::$cache as $group => $cache ) {
echo "<li><strong>Group:</strong>
$group - ( " . number_format( strlen( serialize( $cache ) ) / KB_IN_BYTES, 2 ) . 'k )
</li>';
}
echo '</ul>';
echo '</div>';
}
}
class Devm_Cache_Not_Found_Exception extends Exception {}
Devm_Cache::init_static();
Zerion Mini Shell 1.0