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Php Array Cache Adapter

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

// somehow, decide it's time to warm up the cache!
if ($needsWarmup) {
    // some static values
    $values = array(
        '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()
    );
    $cache->warmUp($values);
}

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