Downgrades an Ubuntu 10.04 LTS system to PHP 5.2, from Ubuntu 9.04

php-downgrade.sh

#!/bin/sh

# Downgrades an Ubuntu 10.04 LTS system to PHP 5.2, from Ubuntu 9.04
# Ryan Tucker <rtucker@gmail.com>, 2010/07/20

# Based on http://mrkandy.wordpress.com/2010/04/16/install-php-5-2-x-in-ubuntu-10-04-lucid/


# Get current PHP 5.3 packages from 10.04 LTS
PHP53PACKAGES=`mktemp php53packagesXXXXX`
dpkg -l | grep php | awk '{print $2}' > $PHP53PACKAGES

# Remove all of them
apt-get purge `tr "\n" " " < $PHP53PACKAGES`

# Set up pins for karmic versions
echo -e "Package: php5\nPin: release a=karmic\nPin-Priority: 991\n"  | tee /etc/apt/preferences.d/php > /dev/null
apt-cache search php5-|grep php5-|awk '{print "Package:", $1,"\nPin: release a=karmic\nPin-Priority: 991\n"}'| tee -a /etc/apt/preferences.d/php > /dev/null
apt-cache search -n libapache2-mod-php5 |awk '{print "Package:", $1,"\nPin: release a=karmic\nPin-Priority: 991\n"}'| tee -a /etc/apt/preferences.d/php > /dev/null
echo -e "Package: php-pear\nPin: release a=karmic\nPin-Priority: 991\n"  | tee -a /etc/apt/preferences.d/php > /dev/null

# set up source for karmic
grep '^deb http.* lucid.*' /etc/apt/sources.list|grep -v "#"| sed s/lucid/karmic/g | tee /etc/apt/sources.list.d/karmic.list > /dev/null

# update package db
apt-get update

# install what was installed before
apt-get -t karmic install `tr "\n" " " < $PHP53PACKAGES`

# restart apache
service apache2 restart