As PHP5 only functionality becomes more common, and the possibility that a security flaw will be exploited affecting sites running on the PHP 4 platform, exploits not specific to WordPress, the need for web hosts to upgrade will become critical to providing quality customer support. It is unlikely that many will remain with the older versions. WordPress is working hard to maintain backwards compatibility as long as is feasible.

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Marius Ion ANGEL HOT SOFT LLC (800) 316-7677