Damien Seguy has posted the latest PHP statistics, the information for June 2007:
Here are the PHP stats for June 2007. To learn about methodology, read la section phpversion. 10.9 millions servers hosted on 2.4 millions IP were surveyed during June, and 25.5 were used for stats : domains without web sites, those unreachable, ISP, shared hosters or domain parkings were not considered.
Among the highlights of these latest stats are mentions of the stable market share PHP has on servers, PHP 5.2.2 usage coming out over PHP 5.2.3, a drop in the use of the PHP 5.1.x series and PHP 4.4.7 being ranked top in the 4.x series. Also included new this month in the stats is information for Apache and IIS version distribution.