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WARNING: You are browsing the documentation for Symfony 4.3 which is not maintained anymore. Consider upgrading your projects to Symfony 5.1.

PHP Array Cache Adapter

4.3 version

PHP Array Cache Adapter

This adapter is a high performance cache for static data (e.g. application configuration) that is optimized and preloaded into OPcache memory storage. It is suited for any data that is mostly read-only after warmup:

use Symfony\Component\Cache\Adapter\FilesystemAdapter;
use Symfony\Component\Cache\Adapter\PhpArrayAdapter;

// somehow, decide it's time to warm up the cache!
if ($needsWarmup) {
    // some static values
    $values = [
        'stats.products_count' => 4711,
        'stats.users_count' => 1356,

    $cache = new PhpArrayAdapter(
        // single file where values are cached
        __DIR__ . '/somefile.cache',
        // a backup adapter, if you set values after warmup
        new FilesystemAdapter()

// ... then, use the cache!
$cacheItem = $cache->getItem('stats.users_count');
echo $cacheItem->get();


This adapter requires turning on the opcache.enable php.ini setting.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.