PHP 5.4.12 and 5.3.22 were released on 21 February, 2013. As usual they are bug fix releases. The complete official changelog can be found here.
Below you will find 64 bit binaries of PHP 5.4.12 and 5.3.22 for Windows. They were compiled with Visual C++ 2008 (MSVC 9). Also, there was a bug in the previous 64 bit 5.4 releases, which would cause php cli to crash when trying to start the built in web server. This has now been fixed.
5.4.12 (Thread Safe)
5.4.12 (Non Thread Safe)
5.3.22 (Thread Safe)
5.3.22 (Non Thread Safe)
Additional extensions can be found here – http://www.mediafire.com/php-win64-extensions.
Please check the 5.3 and 5.4 sub folders for newer versions.