PHP 5.3.9 is now available for download.what’s new in this version?
This release focuses on improving the stability of the PHP 5.3.x branch with over 90 bug fixes, some of which are security related.
Added max_input_vars directive to prevent attacks based on hash collisions.
Fixed (Integer overflow during the parsing of invalid exif header).
Fixed (is_a() triggers autoloader, new optional 3rd argument to is_a and is_subclass_of).
Fixed (mysqlnd cannot be built shared)
Many changes to the FPM SAPI module
PHP 5.3.9 full ChangeLog