PHP4 depreciated, PHP5 minimum requirements

As was just announced on www.php.net, PHP4 will not be supported beyond the end of the year. As a result, we will be diverting all future development efforts to require PHP 5.2 or later. 1.0.x maintenance releases will probably maintain PHP4 compatibility, but we will add a warning in configtest.php. Trunk development heading for a 1.1.0 release will now be PHP 5 only.

For more information, check out the Go PHP 5 site.