To use apcu, the apcu extension has to be installed. You can find it here https://pecl.php.net/package/APCu
Note: apcu is not the same as apc!
APCu is the official replacement for the outdated APC extension. APC provided both opcode caching (opcache) and object caching. As PHP versions 5.5 and above include their own opcache, APC was no longer compatible, and its opcache functionality became useless. The developers of APC then created APCu, which offers only the object caching (read "in memory data caching") functionality (they removed the outdated opcache).
Wondering how to use apcu? The following example should give you a basic understanding.
<?php
date_default_timezone_set('Europe/Amsterdam');
$apcuAvailabe = function_exists('apcu_enabled') && apcu_enabled();
if($apcuAvailabe)
{
//apcu_clear_cache();
$test1 = apcu_fetch('test1');
$test2 = apcu_fetch('test2');
}
$test1[] = rand(1, 1000);
$test2[] = rand(1, 1000);
if($apcuAvailabe)
{
apcu_store('test1', $test1);
apcu_store('test2', $test2);
}
echo sprintf('current - value = %s<br/>', implode(' ,', $test1));
echo sprintf('current - value = %s<br/>', implode(' ,', $test2));
$aPCUIterator = new APCUIterator();
echo sprintf('totalCount = %s<br/>', $aPCUIterator->getTotalCount());
//echo sprintf('totalHits = %s<br/>', $aPCUIterator->getTotalHits()); // Not implemneted/available?
echo sprintf('totalSize = %s<br/>', $aPCUIterator->getTotalSize());
echo '----------------------------------<br/>';
$aPCUIterator->rewind();
echo sprintf('key = %s<br/>', $aPCUIterator->key());
echoCurrent($aPCUIterator->current());
$aPCUIterator->next();
echo '----------------------------------<br/>';
echo sprintf('key = %s<br/>', $aPCUIterator->key());
echoCurrent($aPCUIterator->current());
echo sprintf('valid = %s<br/>', $aPCUIterator->valid() ? 'true' : 'false');
function echoCurrent($current)
{
echo sprintf('current - type = %s<br/>', $current['type']);
echo sprintf('current - key = %s<br/>', $current['key']);
echo sprintf('current - value = %s<br/>', implode(' ,', $current['value']));
//echo sprintf('current - num_hits = %s<br/>', $current['num_hits']); // Not implemneted/available?
echo sprintf('current - mtime = %s<br/>', date("d-m-Y H:i:s", $current['mtime']));
echo sprintf('current - creation_time = %s<br/>', date("d-m-Y H:i:s", $current['creation_time']));
echo sprintf('current - deletion_time = %s<br/>', date("d-m-Y H:i:s", $current['deletion_time']));
echo sprintf('current - access_time = %s<br/>', date("d-m-Y H:i:s", $current['access_time']));
//echo sprintf('current - ref_count = %s<br/>', $current['ref_count']); // Not implemneted/available?
echo sprintf('current - mem_size = %s<br/>', $current['mem_size']);
//echo sprintf('current - ttl = %s<br/>', $current['ttl']); // Not implemneted/available?
}
?>
APC User Cache
- Introducción
- Instalación/Configuración
- Constantes predefinidas
- Funciones APCu
- apcu_add — Cache a new variable in the data store
- apcu_cache_info — Recupera la información almacenada en la memoria APCu
- apcu_cas — Actualiza un valor antiguo con un nuevo valor
- apcu_clear_cache — Limpia el caché del APCu
- apcu_dec — Disminuir un número almacenado
- apcu_delete — Elimina una variable almacenada en caché
- apcu_enabled — Si el APCu es utilizable en el entorno actual
- apcu_entry — Atomically fetch or generate a cache entry
- apcu_exists — Checks if entry exists
- apcu_fetch — Fetch a stored variable from the cache
- apcu_inc — Increase a stored number
- apcu_key_info — Get detailed information about the cache key
- apcu_sma_info — Retrieves APCu Shared Memory Allocation information
- apcu_store — Cache a variable in the data store
- APCUIterator — La clase APCUIterator
- APCUIterator::__construct — Construye un objeto iterador APCUIterator
- APCUIterator::current — Obtener el elemento actual
- APCUIterator::getTotalCount — Obtiene el conteo total
- APCUIterator::getTotalHits — Obtener resultados totales de la memoria caché
- APCUIterator::getTotalSize — Obtiene el tamaño total del caché
- APCUIterator::key — Obtiene la clave del iterador
- APCUIterator::next — Mueve el puntero al siguiente elemento
- APCUIterator::rewind — Rebobina el iterador
- APCUIterator::valid — Comprueba si la posición actual es válida
add a note
User Contributed Notes 2 notes
boefje at hotmail dot com ¶
4 years ago
alex at modula-shop-systems dot de ¶
4 years ago
For PHP-FPM :
Note that all ini values are PHP_INI_SYSTEM and can't be set via php_admin_value in pool.d/xxx.conf and therefore not via different webhosting control/configuration panels.
Use /etc/php/7.x/fpm/conf.d/20-apcu.ini or /etc/php/7.x/fpm/php.ini
