yii\caching\ZendDataCache::getValue PHP Method

This is the implementation of the method declared in the parent class.

protected getValue ( string $key ) : mixed \| false
$key	string	a unique key identifying the cached value
return	mixed \| false	the value stored in cache, false if the value is not in the cache or expired.

    protected function getValue($key)
    {
        $result = zend_shm_cache_fetch($key);
        return $result === null ? false : $result;
    }

ZendDataCache