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
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真的，假的哦，一下跳到5.5。
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真心关注，求分!
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斑竹，别老是复制粘贴，至少得把E文翻译一下，这样大家容易理解。
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还在用5.3X
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用5.4
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在用5.4
其实翻译倒还好 主要是这些改动的意义 求分析~~