Hello,

I have just backported the php-redis (php5-redis) 2.2.5-1~bpo70+1 package for Debian Wheezy. Thanks to the ftp-masters for their quick ACCEPT :)
Now you can install and use the redis PHP extension from the offical repositories, see:

Instructions: http://backports.debian.org/Instructions/
Package: https://packages.debian.org/wheezy-backports/php5-redis