Note about upgrading to Zend Server 2021.4: Only upgrades from Zend Server 9.1, 2019, and 2020 are supported !
For customers running Zend Server 9.0 or earlier, we recommend creating a parallel installation and migrate applications and configuration to the new Zend Server instance. We also recommend to upgrade other stack components at the same time, specifically a more recent version of the underlying OS.

System Requirements

For Zend Server 2021.4

 

PHP 7.1, 7.2, 7.3, 7.4

Linux x86-64

  • RHEL / CentOS 7.x and 8 via RPM packages

  • Debian GNU/Linux 9.x and 10 via DEB packages

  • Ubuntu Linux 18.04 (LTS) and 20.04 (LTS) via DEB packages
Linux Architecture Support: 32-bit systems are not supported.

Linux Power 8

  • Ubuntu Linux 18.04 (LTS) and 20.04 (LTS) via DEB packages
  • RHEL 7.x and 8 via RPM packages

Windows x86 / x86-64 - PHP uses x86 only

  • Windows 10
  • Windows Server 2016, 2019, 2022
Windows PHP Binary Compatibility: Windows PHP 7.1 are compiled with Visual Studio 2015 / VC14, 32-bit
Windows PHP 7.2 & 7.3 are compiled with Visual Studio 2017 / VC15, 32-bit

IBM i

  • V7R3 / V7R4 with latest PTFs
  • V7R5 with latest PTFs

  • Apache 2.4

  • Nginx web server (supported on Linux only)

  • Microsoft IIS on supported Windows systems

For optimal stability and performance, only run Zend Server on a supported browser from the Supported Browser List.

Browser

Version(s)

Comments

Google Chrome (recommended)

Latest

 

Mozilla Firefox

Latest

 

Microsoft Internet Explorer

11 and above

 

Microsoft Edge

Latest

 
Other Browsers: Zend Server may run on other browsers but with unpredictable behavior.

A MySQL server version 5.6, 5.7 or 8.0 is required to run Zend Server in a clustered environment.