Dmitry posted results of performance test comparing PHP 5.2 and 5.3 to internals which are impressive numbers.

The improvements were measured based on several popular pieces of software like Drupal, typo3 and WordPress. The overall performance gian was around thirty percent across the board.

Here are the PHP stats for July 2006. To learn about methodology, read la section phpversion. 15 millions servers were surveyed during May, and 8,1 millions were used for stats: domaines without web sites, those unreachable, ISP or domain parkings were not considered.

In brief :

• PHP 5 keep on growing, but slower
• PHP 5.1.4 is now the most popular PHP 5 version
• PHP 4.4.2 is bigger than ever
• New : PHP adoption by governements around the world

For each of the stats, there's a nice graph of various types to show the distribution and information (such as maps for the spread of PHP's market share all across the world).