Nexen.net has a new look today at something most people take for granted - some of the default extensions loaded (and how often they are) in a PHP installation.
Since PHP 5.2.3 has been published, over 9700 tests were sent to the Quality Assurance Team. In those tests reports, we can find the list of failed tests, and an anonymous PHPinfo(), that helps the PHP team to understand the origin of the errors. With such a number of phpinfo(), it is tempting to get some stats about compilation choices.
Damien has graphed out a few different data sets - the extensions included in most default installations, other popular extensions that may or may not be compiled in, the list of rare extensions (a long list) and how often they show up and, finally, the graphing of all extensions included in any PHP install anywhere. Links to more information about these extensions can be found immediately following the graph.