public function signature($method, $keyfile = null)
	{
		$this->_signature = $method;
		$this->_keyfile = $keyfile;
	}
public function signature($method, $keyfile = null)
	{
		$this->_signature = $method;
		$this->_keyfile = $keyfile;
	}
public function signature ( $ method , $ keyfile = null ) { $ this -> _signature = $ method ; $ this -> _keyfile = $ keyfile ; }
Set the signature method
Set the signature method