A dedicated PHP coding environment and complete integration with web standards, with full support for HTML5, JavaScript, and CSS3 development, as described on the HTML5 Web Development Support page. NetBeans IDE for PHP offers a number of features specific to developing with the latest features of.
Are you sure you're looking for an IDE? The features you're describing, along with the impression of being too complicated that you got from e.g. Aptana, suggest that perhaps all you really want is a good editor with syntax highlighting and integration with some common workflow tools.
For this, there are tons of options. I've used on several platforms successfully, and that alone puts it above most of the rest (many of the IDEs are cross-platform too, but Aptana and anything Eclipse-based is going to be pretty heavy-weight, if full-featured). JEdit has ready-made plugins for everything on your list, and syntax highlighting for a wide range of languages. You can also bring up a shell in the bottom of your window, invoke scripts from within the editor, and so forth. It's not perfect (the UI is better than most Java UIs, but not perfect yet I don't think), but I've had good luck with it, and it'll be a hell of a lot simpler than Aptana/Eclipse.
That said, I do like Aptana quite a bit for web development, it does a lot of the grunt work for you once you're over the learning curve. Too bad no one mentioned. It's really the best IDE I've came across (and I believe I've tried them all). The main pro of this one is that it's NOT Java based. This keeps the whole thing quick.
Features: • Intelligent Syntax Highlighter - automatic switch between PHP, HTML, CSS, and JavaScript depending on your position! I'm always amazed that more people don't use. It has the best debugging facilities of any PHP IDE I have tried, is a very mature product and has more useful features than you can shake a stick. Of note, it has a fantastic HTTP inspector, Javascript debugger and Regular Expression Toolkit. You can get it so that it steps through your PHP, then you see your Javascript running, and then see your HTTP traffic going out over the wire! It also comes in free (Komodo Edit) and open (OpenKomodo versions).