...Features: Syntax coloring and indenting; Documentation browse and search functions; Support for Imenu and SpeedBar; Customization options; and support for language features from PHP 5.4 and beyond.
The latest release can be found at https://github.com/ejmr/php-mode and all bug reports should go there..
An Web IDE that enables you to edit, compile, cvs in/out, do file release and produce documentation from a single friendly user web page or out of a Makefile!