Zend Server 2021.4.2 Documentation
Zend Server is the Professional PHP distribution: An integrated application platform for mobile and web applications, deployment, debugging, and monitoring.
Use Zend Server Z-Ray to inspect, debug and optimize your PHP pages by monitoring requests made to the Web server.
Job Queue provides offline asynchronous processing of PHP tasks and job-management tools
Application performance monitoring gives you a complete view of how the application and server are performing during development or production.
If you are new to Zend Server, see these topics to get started:
What's New in Zend Server 2021.4.2
The following is a summary of what's new in Zend Server. For a complete list, see the Changelog.
Zend Server 2021.4.2:
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Zend Server 2021.4.2 picks up LTS patches introduced in ZendPHP, providing fixes for each of CVE-2025-1219, CVE-2025-1736, CVE-2025-1861, CVE-2025-1734, and CVE-2025-1217, which primarily address TLS issues in the PHP stream API.
Zend Server 2021.4:
- Deprecated support for IBM i v7r2 due to OpenSSL 1.1.1 deprecation by IBM.
- All IBM i >= v7r3 must use at least OSS base 7.3 to be able to install or upgrade.
- Updated extensions
- Security fixes and UX improvements
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