How do you debug your PHP?

[polyfragmented]

y0,

what do you guys use for debugging your PHP? I asked this in my plugin thread, but maybe the question will get a bit more exposure here.

mvlcek replied over there that he uses echo and GS' debug mode.

Suggestions, experiences? Much appreciated.

[ccagle8]

i also do the echo and print_r() functions. I print_r() almost everything, everywhere in the code before I get it working and in production mode.

[polyfragmented]

i also do the echo and print_r() functions. I print_r() almost everything, everywhere in the code before I get it working and in production mode.

I can see where it can come in handy now:

Code:

print_r($filters);
print_r($plugin_info);
print_r($plugins);