According to the latest stats from the TIOBE Programming Community Index, PHP has dropped down a spot from its previous standing last month down to the number five slot for November, being bumped down by (Visual) Basic.
As the long term trends graph shows, though, PHP and Basic are neck and neck, with one only gaining slightly over the other. As the International PHP Magazine site notes:
As the graph on TIOBE's web site indicates, PHP has been charting an uneven course, facing ups and just as many downs. However, PHP's position as of Feb 2006 is significantly higher than that of 2005.
You can get all of the stats and graphs for this latest month of results from the TIOBE site.