How to debug Php code?

Question

I am newbie on PHP. Here is my situation. I write my code in vim and put it under /var/www/ then I can use

localhost/*.php

to run my code on browser.

When my code has bug. It just come out nothing.

How can I debug mu code like c++ or java?

Thanks.

Edited:

The link some friends provide is not helpful for me. I am under Linux. That's for Win.

Answer 1

include this both line in code to see what kind of error is.

<?php 
       ini_set("display_errors",1);
       error_reporting(E_ALL);
        //code goes here
?>