I wonder, what package contains PHP’s ext_skel file. In Debian, it should be /usr/share/php5/ext_skel.
Normally, package is named php5-dev or php5-devel(as on openSUSE).
I’ve installed php5-devel. But
$ rpm -ql php5-devel | grep skel
I found PECL’s CodeGen. It does almost the same. However, it’s just curious, where the good old ext_skel could be.