These are some of my favourites web site about PHP. Links about other arguments are listed in main MENU -> LINKS section.
- http://www.php.net/
the official website is the best place where you can start; search here first if in doubt - http://www.phpmyadmin.net/
phpMyAdmin is one of the best tools to manage MySQL database on the web, written in PHP: essential - http://turck-mmcache.sourceforge.net/