Installation Guide
Welcome to the Zend Server 2021.4.3 Installation Guide.
Zend Server can be installed on many operating system, for development and production. In order to review a full list of supported operating systems, please see the System Requirements page.
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Important note about upgrades
Zend Server 2021.4.3 supports upgrades from version 2019 and up. Upgrading from earlier versions (such as versions 7.x, 8.x, 9.x) is not supported.
If you have an earlier version of Zend Server on the target system, run a parallel install, migrate your configuration and applications from the active instance to the new instance, and then test accordingly before placing the new instance in production.
If you cannot run a parallel instance, you need to remove the earlier version before installing 2021.4.3.
To review specific instructions for your operating system, please select it below.
Need to install an older version?
If you're using an older version of Zend Server, kindly refer to the relevant link below: