TextArea Editor for PHP and HTML w/ highlighting and completion?

I know about CK Editor and TinyMCE but that isn’t what I’m looking for. I would like to find a open-source editor that provides simple text highlighting and maybe even tag completion (HTML) that can be used on a textarea. This would specifically be for my use. So I just want something that gives me some nice formatting like I’m use to in Zend, BBEdit, etc when writing inline PHP and HTML. I don’t want the editor to actually alter anything I’m writing within it. So essentially it would need to add the necessary span elements, etc than remove them upon form submit or something? Not sure if anything like this exists but perhaps it does.


Maybe… https://mozillalabs.com/bespin/ ?

http://marijn.haverbeke.nl/codemirror/ is one of the best.

Looks like this is exactly what I’m after.