cat /etc/apt/preferences
Package: php-pear
Pin: release a=sarge-backports
Pin-Priority: 999

Package: php5-common
Pin: release a=sarge-backports
Pin-Priority: 999

Package: php5-cgi
Pin: release a=sarge-backports
Pin-Priority: 999

Package: php5-cli
Pin: release a=sarge-backports
Pin-Priority: 999

Package: php5-curl
Pin: release a=sarge-backports
Pin-Priority: 999

Package: php5-gd
Pin: release a=sarge-backports
Pin-Priority: 999

Package: php5-mysql
Pin: release a=sarge-backports
Pin-Priority: 999

Package: php5-pear
Pin: release a=sarge-backports
Pin-Priority: 999

Package: phpmyadmin
Pin: release a=sarge-backports
Pin-Priority: 999

Package: squirrelmail
Pin: release a=sarge-backports
Pin-Priority: 999

Package: squirrelmail-locales
Pin: release a=sarge-backports
Pin-Priority: 999