public function getArray($key)
	{
		$this->validateKey($key);
		return $this->has($key) ? $this->params[$key] : [];
	}
public function getArray($key)
	{
		$this->validateKey($key);
		return $this->has($key) ? $this->params[$key] : [];
	}
public function getArray ( $ key ) { $ this -> validateKey ( $ key ) ; return $ this -> has ( $ key ) ? $ this -> params [ $ key ] : [ ] ; }
Returns all values of the parameters with the given key.
If no parameter with the given key exists, an empty array is returned.

@param string $key
@return array
Returns all values of the parameters with the given key . If no parameter with the given key exists an empty array is returned .