public function hasHeader(string $name): bool
	{
		$orig_name = $this->getHeaderName($name);

		return isset($this->headers[$orig_name]);
	}
public function hasHeader(string $name): bool
	{
		$orig_name = $this->getHeaderName($name);

		return isset($this->headers[$orig_name]);
	}
public function hasHeader ( string $ name ) : bool { $ orig_name = $ this -> getHeaderName ( $ name ) ; return isset ( $ this -> headers [ $ orig_name ] ) ; }
Determines whether a header exists.

@param string    $name

@return boolean
Determines whether a header exists .