<?php$x = 75;$y = 25;function addition(){ $GLOBALS['z'] = $GLOBALS['x'] $GLOBALS['y'];}addition();echo $z;?>
提示：
Notice: Undefined index: x in /www/admin/working.php.cn_80/wwwroot/compile.php(20) : eval()'d code on line 6Notice: Undefined index: y in /www/admin/working.php.cn_80/wwwroot/compile.php(20) : eval()'d code on line 6Notice: Undefined variable: z in /www/admin/working.php.cn_80/wwwroot/compile.php(20) : eval()'d code on line 9
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Modify the php.ini settings and set the register_globals value to on.