PHP 5.3.9正式版发布了。

此次更新修复了诸多BUG，如Hash冲突漏洞，对于5.3.8的用户，要速度更新。

Security Enhancements and Fixes in PHP 5.3.9:

Added max_input_vars directive to prevent attacks based on hash collisions. (CVE-2011-4885) （HASH冲突问题）
Fixed bug #60150 (Integer overflow during the parsing of invalid exif header). (CVE-2011-4566)

Key enhancements in PHP 5.3.9 include:

Fixed bug #55475 (is_a() triggers autoloader, new optional 3rd argument to is_a and is_subclass_of).
Fixed bug #55609 (mysqlnd cannot be built shared)
Many changes to the FPM SAPI module

Hash冲突漏洞：https://www.webshell.cc/2488.html