PHP 4: So long, and thanks for all the fish
PHP 4 is no more, with the last PHP 4.4.8 release the end as come. In the past eight years PHP 4 provided people a web-focussed language, solving many web-related problems. Since a few years a much improved version has slowly been taking over market share from PHP 4 – now at more than 25%. …..
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Because of this, we will no longer support PHP 4 with the exception of possible releases addressing security issues until 2008-08-08.
continue reading about dropping PHP4 at 
blog post.
