probably just temporary problem with the php download server (it worked on Saturday)...
if you don't want to wait, you can download the php sources e.g. from here:
http://ftp.icm.edu.p...-5.4.14.tar.bz2
put the archive into your sources directory,
also create an empty php-5.4.14.tar.bz2.done file in there,
and start baking again...