Downgrading to PHP 5.2 from PHP 5.3 on Ubuntu 10.04
On the Ubuntu 10.04 Lucid Lynx release, by default PHP 5.3 is installed. Great if you are using it, but it's not for everyone. Definitely not for me being a Drupal developer, as for the moment, it causes problems.
This method worked for me (however I am not responsible if it doesn't for you). All you need to do it put this lot in a shell file and run it. Remember to chmod +x file for it to run.
php_packages=`dpkg -l | grep php | awk '{print $2}'`
sudo apt-get remove $php_packages
sed s/lucid/karmic/g /etc/apt/sources.list | sudo tee /etc/apt/sources.list.d/karmic.list
sudo mkdir -p /etc/apt/preferences.d/
for package in $php_packages;
do echo "Package: $package
Pin: release a=karmic
Pin-Priority: 991
" | sudo tee -a /etc/apt/preferences.d/php
done
sudo apt-get update
sudo apt-get install $php_packages
sudo /etc/init.d/apache2 restart
