PHP Designer 2006, a freeware IDE for PHP has been released.
Key Features:

• All-in-one editor to edit, debug, analyze and publish PHP scripts
• Syntax highlighting and support for PHP, HTML, XML, CSS, JavaScript, Java, Perl, JavaScript, VB, C#, Java & SQL
• Automatic indentation and insertion of brackets
• Automatic code completion while typing
• Integration with the PHP manual available from php.net with quick keyword search
• FTP
• Code Libraries
• Class Browser

“PHP DESIGNER is a powerful freeware IDE for coding PHP for both professional and novice alike. Designed to help accelerating and enhance the process of edit, debug, analyze and publish PHP scripts all wrapped into a sophisticated streamlined interface!”

Link: MPSOFTWARE - PHP Designer 2006