When making ajax requests, debugging the code seems too annoying, so I have to write the return information to a file and observe the debugging.

class Record
{
	var  $pf;

	public function r_start($file = 'record')
	{
		ob_start();
		echo "____________________________________________n";
		$this->pf  = fopen($file, 'a+' );
	}


	public function r_close()
	{
		echo "n____________________________________________n";
		$out= ob_get_contents() ;
		ob_end_clean();
		fwrite($this->pf , $out);
		fclose($this->pf );
	}
}
?>