How do you debug PHP?

How do you debug PHP?
With what software?
My IDE uses NetBeans.
Usually is a line of the look.

Alas, the code writes more than one count,
I can't see it, I wasted a morning.

Reply to discussion (solution)

Look at Apache log.

Open error display, all syntax errors PHP will tell you
However, no debugging tool can check the correctness of the business process for you, such as code that writes more than one count and is not a grammatical error.

Run View Apache.log

Error log

Check for logic errors General Var_dump yourself

Var_dump +1

Turn On Error display error_reporting (e_all), logic problem or self-collation clear!!

Breakpoint Debugging:

Look at Apache log.

How old are you?

1.error_reporting (E_all)
2. Breakpoint Debug Var_dump ()
Breakpoint Debugging Tool for 3.ide Editor

Good, study of ...
Thank you, guys.

