PHPCon Poland 2024

PHP 5.3.3 Release Announcement

The PHP development team would like to announce the immediate availability of PHP 5.3.3. This release focuses on improving the stability and security of the PHP 5.3.x branch with over 100 bug fixes, some of which are security related. All users are encouraged to upgrade to this release.

Backwards incompatible change:

Security Enhancements and Fixes in PHP 5.3.3:

Key enhancements in PHP 5.3.3 include:

For users upgrading from PHP 5.2 there is a migration guide available on, detailing the changes between those releases and PHP 5.3.

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

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