Running multiple versions of PHP on Ubuntu

Is there an easy way to run multiple versions of PHP on Ubuntu 10.04 (desktop), and switching between them?

I am spoiled with the very easy installation and switching of PHP in WAMP for Windows. This would be for a development environment.

From serverfault Znarkus

• To avoid to install and configure two or more web server (listeing on two or more ports), try to read these:

  • how-can-one-run-multiple-versions-of-php-5-x-on-a-development-lamp-server
  • running-multiple-php-versions-on-a-single-apache-install
  From lg

• The idea would be to manually compile several versions of PHP (./configure, ./make but not ./make install), and have the PHP extension you request loaded within your VirtualHost configuration.

  That way, you can postpone loading the PHP library until you need it, and you can choose a different PHP library for each VirtualHost.

  From Mojah