What's the best way to debug PHP code?

[dealmaker]

Hi,
I am new to php. When I am coding c or c++, I have debugger that I can step through the code line by line and see what's inside the variable. Is there similar debugger for php?

Many thanks.

[bathurst_guy]

i check the line in question via the error message, and also use echo $var :)

[ReadMe.txt]

phped, zend studio and phpedit all offer a debugger that lets you step through a php file line by line, google the names for the websites.