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This evening all Mr.Host web servers have been upgraded to PHP 5.3.3

Backwards incompatible change:

• Methods with the same name as the last element of a namespaced class name will no longer be treated as constructor. This change doesn’t affect non-namespaced classes.

<?php

namespace Foo;

class Bar {
    public function Bar() {

        // treated as constructor in PHP 5.3.0-5.3.2
        // treated as regular method in PHP 5.3.3
    }
}

?>

There is no impact on migration from 5.2.x because namespaces were only introduced in PHP 5.3.

Security Enhancements and Fixes in PHP 5.3.3:

• 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.

For a full list of changes in PHP 5.3.3, see the ChangeLog.