There are a lot of great places where you can get good help with PHP, I suggest you try phpfreaks.com. If you need instant help try their Chat service you may get someone that will help you. Good luck
hotscripts.com is awesome, both paid and free scripts though. sourceforge is also the place to get larger projects.
If you are in the basic level in php, then start from w3schools and for reference have a look on tizag.com/phpT. For more free php sample scripts, i suggest this plus2net.com/php_tutorial/site_map.php. Thanks and All the Best.
I think "victa" and "webdesignbarrie" both are right because I saw both sites. I think you should to try it.