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t220.php

<?php//case 30 静态工具类class tool1{    /**     * @param $info     * @param $url     */    public static function alertGo($info,$url)    {       echo "<script>alert('$info');location.href='$url';</script>";       exit();    }    public static function alertBack($info)    {        echo "<script>alert('$info');history.back();</script>";        exit();    }}

t221.php

<?phpheader('content-type:text/html;charset=utf-8');require_once ('./t220.php');if(true){    tool1::alertGo('添加成功！','./t221.php');}else{    tool1::alertBack('员工添加失败','./t221.php');}