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PHP 开发团队曾经于早些时辰颁布揭橥了 PHP 5.2.1 可用的音讯，据悉，本次颁布揭橥主要是加强');了 5.x 分支的清闲性和安然性。PHP 官方建议运用者进级到最新版。

在 PHP 5.2.1 颁布揭橥关照通告中所列出的安然加强');和删改有：

* Fixed a possible safe_mode & open_basedir bypasses inside the session extension.

* Prevent search engine from indexing the phpinfo() page.

* Fixed a number of input processing bugs inside the filter extension.

* Fixed unserialize() abuse on 64 bit systems with certain input strings.

* Fixed possible overflows and stack corruptions in the session extension.

* Fixed an underflow inside the internal sapi_header_op() function.

* Fixed allocation bugs caused by attempts to allocate negative values in some code paths.

* Fixed possible stack overflows inside zip, imap & sqlite extensions.

* Fixed several possible buffer overflows inside the stream filters.

* Fixed non-validated resource destruction inside the shmop extension.

* Fixed a possible overflow in the str_replace() function.

* Fixed possible clobbering of super-globals in several code paths.

* Fixed a possible information disclosure inside the wddx extension.

* Fixed a possible string format vulnerability in *print() functions on 64 bit systems.

* Fixed a possible buffer overflow inside mail() and ibase_{delete,add,modify}_user() functions.

* Fixed a string format vulnerability inside the odbc_result_all() function.

* Memory limit is now enabled by default.

* Added internal heap protection.

* Extended filter extension support for $_SERVER IN cgi AND apache2 SAPIs.

你可以从上面的链接下载到 PHP 的最新版，此中搜罗齐备的源码包和用于 Windows 平台的二进制包。

Download PHP 5.2.1

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