[development] PHP 4 EOL: 8 August, 2008.

[Gabor Hojtsy]

http://www.php.net/index.php#2007-07-13-1

PHP 4 end of life announcement [13-Jul-2007]

Today it is exactly three years ago since PHP 5 has been released. In 
those three years it has seen many improvements over PHP 4. PHP 5 is 
fast, stable & production-ready and as PHP 6 is on the way, PHP 4 will 
be discontinued.

The PHP development team hereby announces that support for PHP 4 will 
continue until the end of this year only. After 2007-12-31 there will be 
no more releases of PHP 4.4. We will continue to make critical security 
fixes available on a case-by-case basis until 2008-08-08. Please use the 
rest of this year to make your application suitable to run on PHP 5.

For documentation on migration for PHP 4 to PHP 5, we would like to 
point you to our migration guide. There is additional information 
available in the PHP 5.0 to PHP 5.1 and PHP 5.1 to PHP 5.2 migration 
guides as well.