public function has_all(array $keys) {
        foreach ($keys as $key) {
            if (!$this->has($key)) {
                return false;
            }
        }
        return true;
    }
public function has_all(array $keys) {
        foreach ($keys as $key) {
            if (!$this->has($key)) {
                return false;
            }
        }
        return true;
    }
public function has_all ( array $ keys ) { foreach ( $ keys as $ key ) { if ( ! $ this -> has ( $ key ) ) { return false ; } } return true ; }
Determines if the store has all of the keys in a list.

@see cache_is_key_aware
@param array $keys The keys to check for.
@return bool True if all of the keys are found, false otherwise.
Determines if the store has all of the keys in a list .