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How do you debug PHP scripts?
I am aware of basic debugging such as using the Error Reporting. The breakpoint debugging in PHPEclipse is also quite useful.
What is the best (in terms of fast and easy) way to debug in phpStorm or any other IDE?
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You can use Firephp an add-on to firebug to debug php in the same environment as javascript.
I also use Xdebug mentioned earlier for profiling php.
For the really gritty problems that would be too time consuming to use print_r/echo to figure out I use my IDE's (PhpEd) debugging feature. Unlike other IDEs I've used, PhpEd requires pretty much no setup. the only reason I don't use it for any problems I encounter is that it's painfully slow. I'm not sure that slowness is specific to PhpEd or any php debugger. PhpEd is not free but I believe it uses one of the open-source debuggers (like XDebug previously mentioned) anyway. The benefit with PhpEd, again, is that it requires no setup which I have found really pretty tedious in the past.
Xdebug and the DBGp plugin for Notepad++ for heavy duty bug hunting, FirePHP for lightweight stuff. Quick and dirty? Nothing beats dBug.
PhpEd is really good. You can step into/over/out of functions. You can run ad-hoc code, inspect variables, change variables. It is amazing.
i use zend studio for eclipse with the built in debugger. Its still slow compared to debugging with eclipse pdt with xdebug. Hopefully they will fix those issues, the speed has improved over the recent releases but still stepping over things takes 2-3 seconds. The zend firefox toolbar really makes things easy (debug next page, current page, etc). Also it provides a profiler that will benchmark your code and provide pie-charts, execution time, etc.
The most of bugs can be found easily by simply
var_dumping some of key variables, but it obviously depends on what kind of application you develop.For a more complex algorithms the step/breakpoint/watch functions are very helpful (if not necessary)