PHP异常学习, 请指正

               
               
               
                function Cns_Exception_Handler($code, $string, $file, $line){   throw new Exception($string,$code);}
//设置异常捕获处理函数set_error_handler('Cns_Exception_Handler', E_ALL);
//以try结构执行会出现异常的语句try{   print 2/0;   print "This will never be printed";}catch (Exception $e){   print "    Exception catched:\n";   print "    Code: ".$e->getCode()."\n";   print "    Message: ".$e->getMessage()."\n";   print "    Line: ".$e->getLine()."\n";}
?>
[root@localhost html]# php a.php
    Exception catched:
    Code: 2
    Message: Division by zero
    Line: 16