Richard Heyes has pointed out an interesting little app that Lucas Baltes created to visually show the timeline of PHP releases from now back.

The timeline stretches all the way from the current PHP 5 release (bye bye PHP 4) back to some of the initial releases Rasmus made as the "PHP Tools version 1.0" back in 1995. Each entry is timestamped with when it was released and some of the more recent ones have "tails" showing how long their life lasted.

Lucas also links to the museum on the PHP.net website where all of these versions can be downloaded.