Adobe Dreamweaver highlights the word object in PHP sources and I'm wondering why. It's definitely not the name of the generic class, which is generic (Edit: sorry, it's actually stdClass not generic, which I always define myself in all projects).
And as you might have guessed it's not easy to google for answers to this question.
object is a data type in PHP. You typically find it in statements that cast stuff to objects. Additionally, passing an object to gettype() causes it to return the string 'object' (it's not a keyword, it just tells you that it's an actual PHP data type).
The "generic" class in PHP is stdClass. I haven't heard of generic being a PHP keyword, ever.
http://www.php.net/manual/en/reserved.keywords.php does not include "object" (nor "generic", actually; maybe you mean stdClass?).