http://codewalkers.com
http://developer.yahoo.com/php/
http://easyphp.org
http://forums.devshed.com
http://free-php.net
http://hotscripts.com/category/php/
http://htmlgoodies.com/beyond/php/
http://php.net
http://php.resourceindex.com
http://php-editors.com
http://phpbuilder.com
http://phpfreaks.com
http://phpunit.de
http://w3schools.com/php/
http://zend.com