public function header ( $header, $value ) {
			if( $this->write_started ) { throw new InvalidOperationException( "Can not write header, body writing has started." ); }
			fwrite( $this->socket, "$header: $value\r\n" );
			fflush( $this->socket );
		}
public function header ( $header, $value ) {
			if( $this->write_started ) { throw new InvalidOperationException( "Can not write header, body writing has started." ); }
			fwrite( $this->socket, "$header: $value\r\n" );
			fflush( $this->socket );
		}
public function header ( $ header , $ value ) { if ( $ this -> write_started ) { throw new InvalidOperationException ( "Can not write header, body writing has started." ) ; } fwrite ( $ this -> socket , "$header: $value\r\n" ) ; fflush ( $ this -> socket ) ; }
Add an HTTP header

@param $header
@param $value
Add an HTTP header