Eclipse might be the closest you can come, but PHP is a programming language. It's really not much different than C2. C2 is just a visual programming language.
In C2 you might put something like
[Button click] - > set text
in PHP you might write something like
if ( $clicked == true ) { $something= "newtext"; }
Eclipse would help with syntax completion, but most editors do that. They lie when they say C2 isn't programming. It's just visual you are a programmer and didn't even know it.