The following editors are one othe top best and popular php editors (IDE) and most popular ones and are listed below.
One of the top and most powerful PHP IDEs from the PHP developers. 
A free source code editor supports various languages including HTML, PHP, SQL and more. It supports syntax highlighting and WYSIWYG environment. It is under GPL license. Free open source editor for languages like Perl, PHP, Python, Ruby, JavaScript, CSS, HTML, and XML. Full featured PHP IDE and PHP editor for PHP code, HTML including Javascript and CSS. It is commercial. 
It is a small and fast editor for software developers. It supports PHP and other various languages. It is a freeware. Free IDE Framework for supports many languages with code formatter, debugger and parser. You will need to download PHP plugin PHPEclipse from sourceforge.
Free editor for PHP, HTML and other various environments. It has a built in ftp client and spell checker. Easy to use PHP IDE with features include code highlighting, write faster code and quality PHP software development. PHPEd is a multi-functional PHP IDE editor for development of Css, XML and PHP including Smarty template engine. It has advanced code editor and debugger. Engsite is a complete editors and tools package for development of PHP, CSS including Perl and MySQL. It is commercial. Geany is a free, light weight IDE on Linux platforms. It supports editing of PHP, HTML, Perl and many more languages. 
Dev-PHP is a powerful IDE for PHP to create PHP scripts and applications. It is a free software with GNU General public license. PHP Editor is a freeware editor with syntax hightlighting for PHP and other multitude of programming languages. It has a built in browser and a small webserver. PHP Code is a free to download IDE for PHP programming and development. It is lightweight and supports full syntax highlighting for PHP and HTML Netbeans IDE is a free and open source IDE which can be easily configured for PHP programming. Aptana Studio community edition is a open source implementation for ajax and PHP. Rapid PHP Editor is a powerful PHP editor with CSS editor, Javascript and PHP editor all in one package. It is commercial. Compact, fast and easy to use IDE for PHP developers. It is free for download. Multifunctional PHP editor supporting autocomplete PHP, HTML, JavaScript, CSS code highlighting with debugger and SQL autocompleter. It is free for download 
A free light weight PHP code editor with syntax highlighting. It is a freeware and works for Win 98/2000/XP systems.
