PHP实现七天免登录（cookie）

发布时间：2024年01月18日

一、登录页

<?php
if (!empty($COOKIE['username'])){
    header("location:index.php");
}else{
    echo <<<str
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style type="text/css">
        body{
            padding: 0px;
            margin: 0px;
            background-image: linear-gradient(to right, pink, paleturquoise);
        }
        .box{
            width:250px;
            height: 500px;
            background-color: white;
            margin: 100px auto;
            //设置弧度
            border-radius: 15px;
            padding: 0 50px;
        }
        .top{
            font-size: 35px;
            line-height: 220px;
            text-align: center;
            font-family: 华文楷体;
            font-weight: bolder;
        }
        .text{
            width: 100%;
            border: 0px;
            border-bottom: 1px solid black;
            font-size: 20px;
            margin-bottom: 30px;
            outline: none;
            font-family: 华文楷体;
        }
        .btn{
            width: 100%;
            font-size: 25px;
            background-image: linear-gradient(to right, paleturquoise,pink);
            border: 0;
            font-family: 华文楷体;
            color: white;
            margin-top: 10px;
            cursor: pointer;
        }
        .bottom{
            font-size: 20px;
            line-height: 100px;
            text-align: center;
            font-family: 华文楷体;
        }
        .expire{
            font-size: 18px;
            cursor: pointer;
            font-family: 华文楷体;
        }
    </style>
    <script type="text/javascript">
        function sub() {
            var user=document.getElementsByName('user')[0].value;
            var password=document.getElementsByName('pwd')[0].value;
            if (!user){
                alert("用户名为空，请重新输入。")
                return false;
            }
            if (!password){
                alert("密码不能为空，请重新输入。")
                return false;
            }
            document.getElementById("form").submit();
        }
    </script>
</head>
<body>
<div class="box">
    <div class="top">
        登录
    </div>
    <form action="checklogin.php" id="form" method="post">
        <input type="text" name="user" placeholder="用户名" class="text">
        <input type="password" name="pwd" placeholder="密码" class="text">
        <input type="checkbox" name="expire" id="cookie" value="7" class="expire">
        <label for="cookie">7天免登录</label>
        <input type="button" value="提交" class="btn" onclick="sub()">
    </form>
    <div class="bottom">
        没有账户？<a href="register.php">注册</a>
    </div>
</div>
</body>
</html>
str;
}
?>

二、注册页


<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>注册</title>
    <style type="text/css">
        body{
            padding: 0px;
            margin: 0px;
            background-image: linear-gradient(to right, pink, paleturquoise);
        }
        .box{
            width:250px;
            height: 500px;
            background-color: white;
            margin: 100px auto;
            //设置弧度
            border-radius: 15px;
            padding: 0 50px;
        }
        .top{
            font-size: 35px;
            line-height: 100px;
            text-align: center;
            font-family: 华文楷体;
            font-weight: bolder;
        }
        .text{
            width: 100%;
            border: 0px;
            border-bottom: 1px solid black;
            font-size: 20px;
            margin-bottom: 30px;
            outline: none;
            font-family: 华文楷体;
        }
        .btn{
            width: 100%;
            font-size: 25px;
            background-image: linear-gradient(to right, paleturquoise,pink);
            border: 0;
            font-family: 华文楷体;
            color: white;
            margin-top: 10px;
            cursor: pointer;
        }
        .bottom{
            font-size: 20px;
            line-height: 100px;
            text-align: center;
            font-family: 华文楷体;
        }

    </style>
    <script type="text/javascript">
        function sub() {
            var user=document.getElementsByName('user')[0].value;
            var password=document.getElementsByName('pwd')[0].value;
            var password1=document.getElementsByName('pwd1')[0].value;
            var tel=document.getElementsByName('tel')[0].value;
            if (!user){
                alert("用户名为空，请重新输入。")
                return false;
            }
            if (!password){
                alert("注册密码不能为空，请重新输入。")
                return false;
            }
            if (!password1){
                alert("确认密码不能为空，请重新输入。")
                return false;
            }
            if (password1!=password){
                alert("确认密码与注册密码不一致，请重新输入")
                return false;
            }
            if (!tel){
                alert("请您输入手机号")
                return false;
            }
            if (tel.length!=11){
                alert("亲，请输入正确格式的手机号哦")
                return false;
            }
            document.getElementById("form").submit();
        }
    </script>
</head>
<body>
<div class="box">
    <div class="top">
        注册
    </div>
    <form action="doregister.php" id="form" method="post">
        <input type="text" name="user" placeholder="用户名" class="text" >
        <input type="password" name="pwd" placeholder="密码" class="text">
        <input type="password" name="pwd1" placeholder="确认密码" class="text">
        <input type="text" name="tel" placeholder="手机号" class="text">
        <input type="button" value="注册" class="btn" onclick="sub()">
    </form>
    <div class="bottom">
        有账户？<a href="login.php">登录</a>
    </div>
</div>
</body>
</html>

三、注册功能实现

<?php
$conn=mysqli_connect("127.0.0.1","root","root","student2008");
if (mysqli_connect_errno()){
    exit(mysqli_connect_error());
}
mysqli_set_charset($conn,'utf-8');
$username=$_POST['user'];
$password=$_POST['pwd'];
$result=mysqli_query($conn,"select * from user where username='".$username."' and password='".$password."'");
$num=mysqli_num_rows($result);
if($num>0){
    echo "<script>alert('用户信息已存在');history.back();</script>";
}
$result1=mysqli_query($conn,"insert into user(username,password,tel) values (
'".$_POST['user']."','".$_POST['pwd']."','".$_POST['tel']."')");
if ($result1==true){
    echo "<script>alert('注册成功');location.href='login_pwd.php';</script>";
}else{
    echo "<script>alert('登录失败');location.href='register.php';</script>";
}

四、判断是否选择了七天免登录功能

<?php
//判断是否选择了七天免登录
$expire=empty($_POST['expire'])?-1:intval($_POST['expire']);

$conn=mysqli_connect("127.0.0.1","root","root","student2008");
if (mysqli_connect_errno()){
    exit(mysqli_connect_error());
}
mysqli_set_charset($conn,'utf-8');
$username=$_POST['user'];
$password=$_POST['pwd'];
$result=mysqli_query($conn,"select * from user where username='".$username."' and password='".$password."'");
$num=mysqli_num_rows($result);
if ($num>0){
    echo "登录成功";
    //登陆成功，设置cookie
    setcookie("username",$_POST['user'],time()+(3600*24*$expire));
    setcookie("password",$_POST['pwd'],time()+(3600*24*$expire));
   //登陆成功，注册session
    session_start();
    $_SESSION['name']=$_POST['user'];
    //网页重定向
    header("location:index.php");
}else{
    echo "<script>alert('登录失败，请重新登录。');location.href='login.php'</script>)";
}

文章来源:https://blog.csdn.net/m0_63849044/article/details/135585776
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