PHP简易用户登录系统

行云博客

发布于 2020-07-13 10:39:51

1.9K0

发布于 2020-07-13 10:39:51

文章被收录于专栏：行云博客行云博客

PHP简易用户登录系统

最近刚刚看到PHP连接数据库的实例，于是做了一个简易的用户系统

直接上代码

连接数据库：connect.php

<?php
$servername = "localhost";
$username = "formbd";
$password = "formbd";
$dbname = "form";
 
// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
 
// 检测连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
} 

?>

用户注册前端页面:reg.html

<!doctype html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>用户注册页面</title>
    </head>
    <body>
        <form action="reg.php" method="post">
            <p>用户名:<input type="text" name="name"></p>
            <p>密  码: <input type="text" name="password"></p>
            <p><input type="submit" name="submit" value="注册">
                <a href="login.html"><input type="button" name="login" value="已有账号，返回登录"></a>
            </p>
        </form>
    </body>
</html>

注册后端处理:reg.php

<?php 
    header("Content-Type: text/html; charset=utf8");

    if(!isset($_POST['submit'])){
        exit("错误执行");
    }//判断是否有submit操作

    $name=$_POST['name'];//post获取表单里的name
    $user_password=$_POST['password'];//post获取表单里的password

    include('connect.php');//链接数据库
    $q="insert into user(id,username,password) values (null,'$name','$user_password')";//向数据库插入表单传来的值的sql
    $sql = "select * from user where username = '$name'";
   
    if (($conn->query($sql))==$name) {
        echo '用户名已存在';
        $result = $conn->query($sql);
        /*echo "
                    <script>
                            setTimeout(function(){window.kk='reg.html';},1000);
                    </script>

                ";*/
    }
   else {
    $conn->query($q);
    echo "注册成功";
    echo "
                    <script>
                            setTimeout(function(){window.kk='login.html';},1000);
                    </script>

                ";
}
   
    $conn->close();//关闭数据库

?>

用户登录前端页面:login.html

<!doctype html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>登陆</title>
    </head>
    <body>
        <form name="login" action="login.php" method="post">
                <p>用户名<input type=text name="name"></p>
                <p>密 码<input type=password name="password"></p>
                <p><input type="submit" name="submit" value="登录">
                    <a href="reg.html"><input type="button" name="reg" value="注册"></a>
                </p>

            </form>
    </body>
</html>

登录后端处理:login.php

<?PHP
    header("Content-Type: text/html; charset=utf8");
    if(!isset($_POST["submit"])){
        exit("错误执行");
    }//检测是否有submit操作 

    include('connect.php');//链接数据库
    $name = $_POST['name'];//post获得用户名表单值
    $passowrd = $_POST['password'];//post获得用户密码单值

    if ($name && $passowrd){//如果用户名和密码都不为空
             $sql = "select * from user where username = '$name' and password='$passowrd'";//检测数据库是否有对应的username和password的sql

             $result = $conn->query($sql);//执行sql
             $rows=$result->fetch_assoc();//返回一个数值
             if($rows){//0 false 1 true
                   header("refresh:0;url=success.php");//如果成功跳转至success.php页面
                   exit;
             }else{
                echo "用户名或密码错误";
                echo "
                    <script>
                            setTimeout(function(){window.kk='login.html';},1000);
                    </script>

                ";//如果错误使用js 1秒后跳转到登录页面重试;
             }
             

    }else{//如果用户名或密码有空
                echo "表单填写不完整";
                echo "
                      <script>
                            setTimeout(function(){window.kk='login.html';},1000);
                      </script>";

                        //如果错误使用js 1秒后跳转到登录页面重试;
    }

    $conn->close();//关闭数据库
?>

登录成功后:success.php

PS:功能未完善

<?php  
include 'connect.php';
session_start(); //声明变量
$username = isset($_SESSION['nmae']) ? $_SESSION['name'] : "";
?>

<!doctype html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>登陆成功</title>
    </head>
    <body>
        欢迎光临
        <?php  echo $username;?>
        <?php  ?>
    </body>
</html>

本文参与腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。

原始发表：2020/07/08 ，如有侵权请联系 cloudcommunity@tencent.com 删除

php