For WordPress 3.2, due in the first half of 2011, we will be raising the minimum required PHP version to 5.2. Why 5.2? Because that’s what the vast majority of WordPress users are using, and it offers substantial improvements over earlier PHP 5 releases. It is also the minimum PHP version that the Drupal and Joomla projects will be supporting in their next versions, both due out this year.
More details here.
Don’t know how I missed this news on Friday, but WordPress is finally dropping support for PHP 4 and MySQL 4. From version 3.2, PHP 5.2 will be required to install the WordPress blogging platform. Not only that, it appears as if Joomla as well as Drupal will be doing the same thing.
Hopefully this will trigger a widespread dropping of PHP 4 (I am looking at you CodeIgniter – although Kohana looks pretty sweet). With PHP 6 on its way, its about time hosts and developers stopped using PHP 4 – it is old and outdated.