When installing X-space 3.0/supesite 5.5, the system prompts "Attention: Zend optimizer not installed" <br/> and finds a solution. <Br/> PHP. find <br/> Zend. ze1_compatibility_mode = off <br/> changed to: <br/> Zend. ze1_compatibility_mode = on <br/> zend_optimizer.enable_loader = 0 <br/> changed to: <br/> zend_optimizer.enable_loader = 0 <br/> restart apache <br/> where: <br/> PHP. the ini configuration file is in the XAMPP/Apache/bin directory <br/> PHP. the Zend configuration in the ini configuration file is as follows: <br/> [Zend] <br/> zend_extension_ts = "F:/webroot/xampplite/PHP/zendoptimizer/lib/zendextensionmanager. DLL "<br/> zend_extension_manager.optimizer_ts =" F:/webroot/xampplite/PHP/zendoptimizer/lib/optimizer "<br/>; zend_optimizer.enable_loader = 0 <br/> zend_optimizer.enable_loader = 1 <br/>; Limit = 13 <br/> zend_optimizer.optimization_level = 15 <br/>; Limit = <br/>