What tools are available for developing PHP programs. I'm particularly looking for something that can hook into Drupal so you can step through code and add breakpoints. Basically, a Visual Studio for PHP would be the best. Anyone know of this? Can you guys maybe mention what you currently use (even if it's just mentioning the text editor)? What is the industry standard?
There is an article on how to configure eclipse/pdt for drupal on drupal.org: Configuring Eclipse
You may also want to take a look at the complete list for development tools, as there are a lot of tools listed you may find helpful.
Eclipse is a great ide. Can step through code in debugging using e.g xdebug. Code completion is good
If you would like to pay $399 for a year of subscription, you may try Zend Studio. Actually a good text editor like vim and emacs (I personally use vim) is fairly enough for PHP development I think.
PHPEd is a fantastic PHP IDE for Supported platforms for Windows 98, ME, 2000, 2003, XP, Vista
It has a lot of the functionality of Visual Studio.
I've been meaning to try out Delphi for PHP for simply ages, but haven't gotten around to it yet.
Here's the download link for a free trial, would be worth investigating.
Aptana Studio http://www.aptana.com/ Free & Open source Fully Javascript / DOM Support
I'm fond of Komodo Edit, which you can get for free, or pay the cash for Komodo IDE.
I use free PHP IDE - Codelobster PHP Edition with special Drupal plug-in.