Zend Optimizer is a PHP extension that can be installed to improve the performance of PHP applications. It does this by optimizing the PHP code and caching the results, which can lead to significant speed improvements. To check if Zend Optimizer is installed, you can use the following steps:
- Open a command prompt.
- Type the following command: php -v
- Press Enter.
If Zend Optimizer is installed, you will see a line in the output that says “Zend Optimizer Version”. If you do not see this line, then Zend Optimizer is not installed.