public function hasMany(array $keys)
    {
        foreach ($keys as $key) {
            if (!$this->has($key)) {
                return false;
            }
        }

        return true;
    }
public function hasMany(array $keys)
    {
        foreach ($keys as $key) {
            if (!$this->has($key)) {
                return false;
            }
        }

        return true;
    }
public function hasMany ( array $ keys ) { foreach ( $ keys as $ key ) { if ( ! $ this -> has ( $ key ) ) { return false ; } } return true ; }
Determines whether all keys present in the session storage

@param array $keys
@return boolean
Determines whether all keys present in the session storage