Collection
Collection
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
<?php
//开启session
session_start();
//var_dump($_SESSION);
if(empty($_SESSION['admin'])){
echo '<a href="login.html">登录</a>|<a href="">注册</a>';
}else{
echo '欢迎'.$_SESSION['admin']['name'].'光临ss34破网站|<a href="./outlog.php">退出</a>';
}点击 "运行实例" 按钮查看在线实例
<?php
session_start();
var_dump($_POST);
$name = $_POST['username'];
$password = md5($_POST['password']);
$link = mysqli_connect('localhost','root','123456');
if (mysqli_connect_errno($link)>0) {
echo mysqli_connect_error($link);exit;
}
mysqli_select_db($link,'ss34');
mysqli_set_charset($link,'utf8');
$sql="SELECT * FROM myuser WHERE name='{$name}' and password='{$password}'";
$result = mysqli_query($link,$sql);
if($result && mysqli_num_rows($result)>0){
//将得到的内容存储在session中除密码以外
$row = mysqli_fetch_assoc($result);
//var_dump($row);
//销毁密码
unset($row['password']);
//var_dump($row);
//将没有密码的值赋值给session即可
$_SESSION['admin']=$row;
//var_dump($_SESSION);
echo '登录成功';
echo '<a href="index.php">返回</a>';
}else{
echo '用户名或密码不正确！';
}点击 "运行实例" 按钮查看在线实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <form action="dologin.php" method="post"> 用户名: <input type="text" name="username"><br/> 密码: <input type="password" name="password"><br/> <input type="submit" value="登录"> </form> </body> </html>
点击 "运行实例" 按钮查看在线实例
<?php
session_start();
unset($_SESSION['admin']);
header('location:index.php');点击 "运行实例" 按钮查看在线实例
