Because of this strategy, WordPress runs pretty much anywhere. Web hosting platforms, however, change over time, and we occasionally are able to reevaluate some of the requirements for running WordPress. Now is one of those times. You probably guessed it from the title — we’re finally ready to announce the end of support for PHP 4 and MySQL 4!
Al parecer el 4 ya no es popular. En otras palabras, esperemos unos 3-5 años mas, para eliminar el soporte de 5.2.