客户端设置密码保存

4.19.php
<?php
/*
 * 
 * @Authors peng--jun 
 * @Email   1098325951@qq.com
 * @Date    2015-11-05 12:10:47
 * @Link    http://www.cnblogs.com/xs-yqz/
 * @version $Id$
 ==========================================
 */
 header("Content-type: text/html; charset=UTF-8"); 
 if ($_COOKIE["user"]["xm"]) {                 //尝试获取指定的Cookie变量，如果有
     $visnum = intval($_COOKIE["user"]["num"])+1;//将原来的访问次数加1
     $expire = intval($_COOKIE["user"]["expire"]);//获取有效期
     //将本次访问时间写入Cookie
     setcookie("user[dt]",date("Y-m-d h:i:s"),time()+3600*$expire);
     setcookie("user[num]",$visnum,time()+3600*$expire);
     echo "欢迎您：".$_COOKIE["user"]["xm"];
     echo "<br/>这是您第".$visnum."次访问本网站";
     echo "<br/>您上次访问是在".$_COOKIE["user"]["dt"];
 }else {//没有Cookie则显示登录表单
     echo ' <!DOCTYPE html>
     <html lang="en">
     <head>
         <meta charset="UTF-8">
         <title>Document</title>
     </head>
     <body>
         <form method="post" action="4.20.php">
        <p>账号：<input name="xm" type="text"></p>
        <p>密码：<input name="pwd" type="password"></p>
        <p>保存：<select name="Save">
                <option value="-1">不保存</option>
                <option value="7">保存一周</option>
                <option value="30">保存一月</option>
            <input type="submit" name="submit" value="登陆">
        </p>
         </form>
     </body>
     </html>
     ';
 }
?>

4.20.php

<?php
/*
 * 
 * @Authors peng--jun 
 * @Email   1098325951@qq.com
 * @Date    2015-11-05 19:04:51
 * @Link    http://www.cnblogs.com/xs-yqz/
 * @version $Id$
 ==========================================
 */
 header("Content-type: text/html; charset=UTF-8"); 
 if ($_POST["xm"] == "admin" && $_POST["pwd"] == "123") {
     setcookie("user[xm]",$_POST["xm"],time()+3600*intval($_POST["Save"]));
     setcookie("user[dt]",date("Y-m-d h:i:s"),time()+3600*intval($_POST["Save"]));
     setcookie("user[num]",1,time()+3600*intval($_POST["Save"]));
     setcookie("user[expire]",$_POST["Save"],time()+3600*intval($_POST["Save"]));
     //保存有效期到Cookie
     echo $_POST["xm"].":首次光临";
     var_dump($_COOKIE);
     
 }else{
     echo "<script>alert('用户或密码不正确');location.href='4.19.php';</script>";
 }
?>
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原文地址：https://www.cnblogs.com/xs-yqz/p/4943524.html