PHP 5.5.6发布.2013-11-14.经过1个RC.上个版本是2013-10-18的5.5.5。修正了10几个Bug及安全漏洞。不知道有多少人已经升级5.5到线上生产环境。遗留产品线5.4.21/5.3.27。其中5.3已经停止常规开发。

完全改进：

Version 5.5.6

14-Nov-2013

• Core:
  • Improved performance of array_merge() and func_get_args() by eliminating useless copying.
  • Fixed bug #65947 (basename is no more working after fgetcsv in certain situation).
  • Fixed bug #65939 (Space before ";" breaks php.ini parsing).
  • Fixed bug #65911 (scope resolution operator - strange behavior with $this).
  • Fixed bug #65936 (dangling context pointer causes crash).
• FPM:
  • Changed default listen() backlog to 65535.
• MySQLi:
  • Fixed bug #66043 (Segfault calling bind_param() on mysqli).
• OPCache:
  • Increased limit for opcache.max_accelerated_files to 1,000,000.
  • Fixed issue #115 (path issue when using phar).
  • Fixed issue #149 (Phar mount points not working with OPcache enabled).
• ODBC:
  • Fixed bug #65950 (Field name truncation if the field name is bigger than 32 characters).
• PDO:
  • Fixed bug #66033 (Segmentation Fault when constructor of PDO statement throws an exception).
  • Fixed bug #65946 (sql_parser permanently converts values bound to strings).
• Standard:
  • Fixed bug #64760 (var_export() does not use full precision for floating-point numbers).

下载：

Version 5.5.6

14-Nov-2013

• Core:
  • Improved performance of array_merge() and func_get_args() by eliminating useless copying.
  • Fixed bug #65947 (basename is no more working after fgetcsv in certain situation).
  • Fixed bug #65939 (Space before ";" breaks php.ini parsing).
  • Fixed bug #65911 (scope resolution operator - strange behavior with $this).
  • Fixed bug #65936 (dangling context pointer causes crash).
• FPM:
  • Changed default listen() backlog to 65535.
• MySQLi:
  • Fixed bug #66043 (Segfault calling bind_param() on mysqli).
• OPCache:
  • Increased limit for opcache.max_accelerated_files to 1,000,000.
  • Fixed issue #115 (path issue when using phar).
  • Fixed issue #149 (Phar mount points not working with OPcache enabled).
• ODBC:
  • Fixed bug #65950 (Field name truncation if the field name is bigger than 32 characters).
• PDO:
  • Fixed bug #66033 (Segmentation Fault when constructor of PDO statement throws an exception).
  • Fixed bug #65946 (sql_parser permanently converts values bound to strings).
• Standard:
  • Fixed bug #64760 (var_export() does not use full precision for floating-point numbers).

下载：http://us2.php.net/distributions/php-5.5.6.tar.bz2