Grep and replace over all files in the current dit and the dirs below that;

perl -e '@f=`find . -type f`;foreach(@f){chomp;$s=`cat $_`;$s=~s/php/jsp/isgm;open(F,">$_");print F $s; close F;}';

When the time on the server is not ok, even after running ntpdate, probably your timezone is wrong. Run:

tzconfig

and set your timezone even when it looks ok already.