PhpMyEdit - PhpMyEdit is an automated PHP code generator and MySQL table editor that provides a platform for the instant table editing.
Kodiak PHP - Kodiak PHP can run any PHP code directly (offline) on your iPad, no need for an internet connection.
PhpStorm - Professional IDE for PHP and Web Developers
Rapid PHP - Rapid PHP editor is the world's fastest and lightest PHP IDE for Windows with code intelligence and tools for PHP, HTML, CSS, and JavaScript, including PHP debugger, FTP/SFTP client, UTF-8 support and more.
phpDesigner - Powerful PHP IDE and PHP editor with built-in HTML, CSS and JavaScript editor. Fast. Powerful.
NuSphere PhpEd - PhpED - PHP IDE integrated development environment for developing web sites using PHP, HTML, Perl, JScript and CSS that combines a comfortable editor, debugger, profiler with the MySQl, PostrgeSQL database support based on easy wizards and tutorials.