According to the latest results from the TIOBE Software Programming Community Index (Popularity) for April 2007, PHP has remained in the top five of the list, staying strong at number four.
It saw a loss of 2.24% from the previous ranking but, thankfully, the rest of the top five saw the same kind of decrease. According to their long term trends, PHP is seeing an overall decline (right along with Java) as one of the top languages. Other languages like C++, Python, and Ruby are currently growing in use but don't quite have the percentage of adoption needed yet.
Their results also show a good jump in the adoption of object-oriented languages, but a drop in procedural language use.