At Nov-13 20:57:44UTC, they released PHP5.5.6.
According to ( ChangeLog ), it fixes some bugs against PHP 5.5.5, and adds some performance improvements.
I downloaded a Thread Safe version php-5.5.6-Win32-VC11-x86.zip for my server (Windows7HP+SP1(x86)). It requires VC11. If you don’t have VC11 on your Windows, you must install vcredist_x__.exe before the PHP configuration.
The text in the file php.ini-production has a change as fixed bug #65939 (Space before “;” breaks php.ini parsing —> [; size of the optimized code.]). So, I also fixed the line in my php.ini though the bug had had no influence on my server.
As the official PHP binary includes php5apache2_4.dll, I extract the zip archive and replace all PHP5.5.5 files with all PHP5.5.6 files except my php.ini. Then, I restart my Apache. That’s it.
If you need how to configure PHP5.5, please see the post. It is for a mbstrings user, but the information gives some help for you.