Komodo's multi-language editor features autocomplete and calltips not only for PHP, but also for HTML, CSS, and JavaScript in PHP files. There's also local and remote PHP debugging, Smarty template support, HTTP Inspector, and JavaScript debugging.   Code: PHP 5.0

NuSphere PhpED is today's top integrated development environment for php. Suitable both for small individual works and large multi-developer projects, PhpED considerably boost up the development process.   Code: PHP 5.0

gPHPEdit is a project to develop a GNOME2 editor that is dedicated to editing PHP files and other supporting files such as HTML and CSS files. It features 64 bit support, remote file systems support, and much more.   Code: PHP 4.0

PHP Code Library makes it very easy to manage your source code. It supports multiple languages and makes it easy to keep your code organized, save your data in a secure encrypted database, paste your favorites code snippets quickly, synchronize data, etc.   Code: PHP 4.0

The goal of Pot is to totally divide logic from the design. Pot can be used by ‘common’ people just writing some XML tags in the html code, that will be parsed by the Php Pot code to create the final working page.   Code: PHP 4.0