PHP是一種新型的CGI程序編寫語言,易學易用,運行速度快,可以方便快捷地編寫出功能強大,運行速度快,并可同時運行于 Windows、Unix、Linux平臺的Web后臺程序, 內置了對文件上傳、密碼認證、Cookies操作、郵件收發、動態GIF生成等功能,PHP 直接為很多數據庫提供原本的連接,包括Oracle、Sybase、Postgres、Mysql、Informix、Dbase、Solid、 Access等,完全支持ODBC接口,用戶更換平臺時,無需變換PHP代碼,可即拿即用.

http://cn.php.net/distributions/php-5.2.13.tar.bz2 (源碼)
http://cn.php.net/distributions/php-5.2.13-Win32.zip (二進制包)
查看ChangeLog: http://www.php.net/ChangeLog-5.php#5.2.13

Security Enhancements and Fixes in PHP 5.2.13:

• Fixed safe_mode validation inside tempnam() when the directory path does not end with a /). (Martin Jansen)
• Fixed a possible open_basedir/safe_mode bypass in the session extension identified by Grzegorz Stachowiak. (Ilia)
• Improved LCG entropy. (Rasmus, Samy Kamkar)

• Fixed bug #50940 Custom content-length set incorrectly in Apache sapis. (Brian France, Rasmus)
• Fixed bug #50847 (strip_tags() removes all tags greater then 1023 bytes long). (Ilia)
• Fixed bug #50661 (DOMDocument::loadXML does not allow UTF-16). (Rob)
• Fixed bug #50632 (filter_input() does not return default value if the variable does not exist). (Ilia)
• Fixed bug #50540 (Crash while running ldap_next_reference test cases). (Sriram)
• Fixed bug #49851 (http wrapper breaks on 1024 char long headers). (Ilia)
• Over 30 other bug fixes.