Wikibooks is free, and the link is to Programming PHP. You will find information on security and how to secure items, the basic nuts and bolts on programming php, and also some advanced concepts to feed your brain.
Editors
PHP for Homesite
HomeSite/PHP Add-on\'s and Resources
Zend Studio - PHP Development Environment
Zend's professional IDE. Code completion, local and remote debugging, code analyzer, and profiler. Free test drive - http://zend.com/store/evaluation.php?pid=77&download=1 Pricey, but extensive and po
PHPEdit
Groovy Windows open source PHP IDE - debugging, syntax highlighting, etc.
O'Reilly Safari Bookshelf
Submitted by brad_mn1988 on Tue, 03/04/2003 - 6:44pm.Safari Bookshelf is an electronic reference library for programmers and IT professionals.
I recommend that everyone get on board for the 14 day free trial (be
sure to put a reminder in your calendar to cancel before the 14 days is
up so that you don't get flipped into a $19.99 monthly subscription
without your wanting it to).
