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

Answer 1

PHP produces an error_log file in its directory whenever a problem occurs, you can find debug information there.

Also, try using var_dump($someVarible). This will give you useful information about the current state of a variable - often better than echo.