PHPBuilder.com has a review posted today of a piece of PHP development software - RapidPHP 2007:

Of the many editors available for creating (X)HTML, CSS, JavaScript, and PHP pages, several combine a few different yet compatible languages. Some include support and a few manage to make it work seamlessly. RapidPHP 2007 belongs in the latter category.

They walk through the list of features (including a PHP syntax checker) and include a screenshot of the PHP function hints in action. The reviewer also talks about the support for other languages it has - the (X)HTML editor and CSS style sheet editor.