Zend Optimizer not installed
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The component Zend Optimizer is not installed on the Web Server and therefore cannot service encoded files. Please download and install on the Web Server the freely available Zend Optimizer.
Zend Technologies can not help with resolving issues related to this message appearing on websites not belonging to Zend Technologies.
What is the Zend Optimizer?
The Zend Optimizer is one of the most popular PHP plugins for performance-improvement, and has been freely available since the early days of PHP 4. It improves performance by taking PHP's intermediate code through multiple Optimization Passes, which replaces inefficient code patterns with efficient code blocks. The replaced code blocks perform the exact same operations as the original code, only faster.
In addition to improving performance, the Zend Optimizer also enables PHP to transparently load files encoded by the ZendGuard.