The PHP development team announces the immediate availability of PHP
5.3.21. About 5 bugs were fixed All users of PHP are encouraged to upgrade to PHP 5.4. PHP 5.3.21 is recommended for those wishing to remain on the 5.3 series.
For source downloads of PHP 5.3.21 please visit our downloads page,
Windows binaries can be found on windows.php.net/download/.
The list of changes is recorded in the ChangeLog.