PHP终止PHP5.2的积极更新 鼓励用户升级到PHP5.3

昨日，在php官网上php5.2.x系列稳定版更新到php5.2.14，PHP5.3.x系列更新到PHP5.3.3。同时这个版本主要改进了PHP5.2.x系列的稳定性，修复60多个BUG，部分BUG与安全相关。这个版本标志着对PHP5.2系列更新的结束，在此版本之后不再积极更新PHP5.2x，其安全补丁可能以单个形式发布。

与此同时，PHP开发团队发布了PHP5.3.3，修复了近100个BUG，鼓励所有PHP5.2系列的用户升级到PHP5.3。 但是实际上国内很多PHP程序对PHP5.3的支持都有不少小问题。

此外，PHP官网着重列出一个PHP5.3.3新的不兼容特性：在命名空间里，和类名一致的函数不再被作为一个构造函数。不过没有使用namespace的类不受影响。

<?php
namespace Foo;
class Bar {
  public function Bar() {
    // 在PHP 5.3.0-5.3.2版本作为构造函数
    // 在PHP 5.3.3作为一个普通函数
  }
} ?>

以下是PHP5.3.3的修复清单。 Rewrote var_export() to use smart_str rather than output buffering, prevents data disclosure if a fatal error occurs (CVE-2010-2531).

• Fixed a possible resource destruction issues in shm_put_var().
• Fixed a possible information leak because of interruption of XOR operator.
• Fixed a possible memory corruption because of unexpected call-time pass by refernce and following memory clobbering through callbacks.
• Fixed a possible memory corruption in ArrayObject::uasort().
• Fixed a possible memory corruption in parse_str().
• Fixed a possible memory corruption in pack().
• Fixed a possible memory corruption in substr_replace().
• Fixed a possible memory corruption in addcslashes().
• Fixed a possible stack exhaustion inside fnmatch().
• Fixed a possible dechunking filter buffer overflow.
• Fixed a possible arbitrary memory access inside sqlite extension.
• Fixed string format validation inside phar extension.
• Fixed handling of session variable serialization on certain prefix characters.
• Fixed a NULL pointer dereference when processing invalid XML-RPC requests (Fixes CVE-2010-0397, bug #51288).
• Fixed SplObjectStorage unserialization problems (CVE-2010-2225).
• Fixed possible buffer overflows in mysqlnd_list_fields, mysqlnd_change_user.
• Fixed possible buffer overflows when handling error packets in mysqlnd.
• Key enhancements in PHP 5.3.3 include:
• Upgraded bundled sqlite to version 3.6.23.1.
• Upgraded bundled PCRE to version 8.02.
• Added FastCGI Process Manager (FPM) SAPI.
• Added stream filter support to mcrypt extension.
• Added full_special_chars filter to ext/filter.
• Fixed a possible crash because of recursive GC invocation.
• Fixed bug #52238 (Crash when an Exception occured in iterator_to_array).
• Fixed bug #52041 (Memory leak when writing on uninitialized variable returned from function).
• Fixed bug #52060 (Memory leak when passing a closure to method_exists()).
• Fixed bug #52001 (Memory allocation problems after using variable variables).
• Fixed bug #51723 (Content-length header is limited to 32bit integer with Apache2 on Windows).
• Fixed bug #48930 (__COMPILER_HALT_OFFSET__ incorrect in PHP >= 5.3).
• For users upgrading from PHP 5.2 there is a migration guide available on http://php.net/migration53, detailing the changes between those releases and PHP 5.3.

PHP5.2.14主要更新清单

• Rewrote var_export() to use smart_str rather than output buffering, prevents data disclosure if a fatal error occurs.
• Fixed a possible interruption array leak in strrchr().(CVE-2010-2484)
• Fixed a possible interruption array leak in strchr(), strstr(), substr(), chunk_split(), strtok(), addcslashes(), str_repeat(), trim().
• Fixed a possible memory corruption in substr_replace().
• Fixed SplObjectStorage unserialization problems (CVE-2010-2225).
• Fixed a possible stack exaustion inside fnmatch().
• Fixed a NULL pointer dereference when processing invalid XML-RPC requests (Fixes CVE-2010-0397, bug #51288).
• Fixed handling of session variable serialization on certain prefix characters.
• Fixed a possible arbitrary memory access inside sqlite extension. Reported by Mateusz Kocielski.
• Key enhancements in PHP 5.2.14 include:
• Upgraded bundled PCRE to version 8.02.
• Updated timezone database to version 2010.5.
• Fixed bug #52238 (Crash when an Exception occured in iterator_to_array).
• Fixed bug #52237 (Crash when passing the reference of the property of a non-object).
• Fixed bug #52041 (Memory leak when writing on uninitialized variable returned from function).
• Fixed bug #51822 (Segfault with strange __destruct() for static class variables).
• Fixed bug #51552 (debug_backtrace() causes segmentation fault and/or memory issues).
• Fixed bug #49267 (Linking fails for iconv on MacOS: "Undefined symbols: _libiconv").