Upgrading Zend Server on Windows

The procedures on this page describe the upgrade procedures for a single Zend Server and a Zend Server cluster on a Windows operating system.

Please read the following restrictions carefully before proceeding.

Upgrade Restrictions

Upgrading Zend Server can only be performed when upgrading from Zend Server 2019.0 and newer to Zend Server 2021.2.x, or when upgrading between Zend Server 2021.2.x versions.

Direct upgrades from Zend Server 9.1 or older can only be performed using a clean installation of Zend Server 2021.2. If a clean installation is not possible, you will need to complete a two-step upgrade procedure. For more information, please contact the Zend Support Center.

For a list of limitations and known upgrade issues, see the Zend Server Release Notes.

Zend Server Versions/PHP Versions Support

This table specifies the PHP versions supported by the latest versions of Zend Server.

Zend Server 8.5 Zend Server 9.1 Zend Server 2019.0 Zend Server 2021.0
PHP 5.6
  PHP 7.1 PHP 7.1 PHP 7.1
    PHP 7.2 PHP 7.2
    PHP 7.3 PHP 7.3
      PHP 7.4