Warning: require_once(Zend/Date/DateObject.php): failed to open stream: 没有那个文件或目录 in /opt/lampp/htdocs/ThinkPHP2/Extend/Vendor/Zend/Date.php on line 25

Fatal error: require_once(): Failed opening required 'Zend/Date/DateObject.php' (include_path='.:/opt/lampp/lib/php') in /opt/lampp/htdocs/ThinkPHP2/Extend/Vendor/Zend/Date.php on line 25