See:

For now, you will find httpd 2.4.1 and php 5.4.0 (backported from Fedora 18).

Of course, this repository is for expert only, which are not afraid of breaking their installation.

For yum, just add, in your /etc/yum.repos.d/remi.repo :

[remi-dev]
name=Les RPM de remi en DEV pour Fedora $releasever - x86_64
baseurl=http://rpms.famillecollet.com/fedora/$releasever/devs/x86_64/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi