At the moment I'm using eclipse with viplugin. I also know about netbeans and its vi plugin. I find both of these IDEs don't really fit my tastes though. Too slow, bad remote editing support. I don't really have time at the moment to set up and try a vim based ide either.
So, what other PHP IDE is available that supports vi key bindings? I'm willing to pay for a commercial one if necessary.
Visual Studio has a vi emulator (http://www.viemu.com) available for it.
I'm not sure how well Visual Studio works as an IDE for PHP though. But it's a good IDE in general.
check out komodo edit (edit is free, komodo ide is ~$250) from active state (activestate.com). It supports a bunch of dynamic languages (php, python, perl) and has vi and emacs keybindings
I too would be curious as to why VIM is not an option for you. If you have reason to rule it out, that's fair enough - but if not then I'd encourage you to think again about it.
I am a PHP programmer and I currently use VIM as my IDE.
And yeah you still get the omni-completion, file explorer, smart auto-indenting, it's cross platform, etc etc.
I personnaly use netbeans with jvi plugin. The vi emulation of this vi plugin is near perfect, plus you get the very good (and fast growing) Netbeans Ide.