A collection of tips & tricks for writing PHP in Emacs
PHP mode. Add notes.
Various packages that make PHP editing easier.
Drupal mode, Symfony2, etc etc
GEBEN, what else? Non-IDE based debugging tools
EDEP, what else?
phptags, ctags, gtags, etc etc
Main branch of ctags (PHP patches included): https://github.com/universal-ctags
Discussion board about PHP support in Emacs: https://groups.google.com/forum/#!forum/emacs-php