I regularly work on projects employing the following languages:

• XML
• XHTML
• PHP
• SQL/MySQL
• CSS
• PERL
• Javascript

I'm looking for an editor to use. I don't need WYSIWYG, I don't need site managers/templates/tag menus, or any of that stuff. Basically, all I need above what gedit would provide is the ability to color different tag types as I please and line numbers. There's other features I like, but they aren't as important as those two. The only reason I prefer the aforementioned features is that after xty-six hours of coding, black text all starts to look the same. ;]

I've tried Nvu, Bluefish, Quanta Plus, and Screem. All of them came close, but didn't quite cut it, usually because of various "extra" annoying features.

So, any suggestions? Triple Bonus points if the program has an interpreter built in that allows me to preview the code as a web browser might see it. (Yes, I am that lazy.)

EDIT:
Haha I just discovered that gedit includes customizable syntax highlighting for XML, line numbers and current line highlighting! I keep forgetting that this is Linux I'm dealing with here. Well, looks like it's gedit for now, unless someone can point me to a better program...

NOOB ALERT LOLZ

I really liked HTML-Kit when I did this sort of thing (up to a year ago). It's open source, modular, free (for personal use), had modules for php, CSS, etc. And, for those bonus points -- it will search your system for all installed browsers & let you see the code as it would be presented in any of them.

There may be better ones by now, and there's a learning curve (because it's powerful!), but give it a try. I originally found HTML-Kit as a superset of HTML-Tidy, which cleaned up older HTML to conform to new standards. Some w3c folk worked on it. If you can't find it, let me know and I'll search for a link.

I looked at their site (html-kit.com) and sent them an email, whereupon they informed me that the Linux version would cost me $55. Boo.

Yet, their current Windows version is free?! WTFBBQ?!