异步请求 - 用户数据 - session实战

login文档中doLogin函数

async function doLogin(obj){
    const email = obj.form.email.value;
    const password = obj.form.password.value;
    if (email.length > 0 && password.length > 0){
      const response = await fetch('./lib/user/handle.php', {
        method:'POST',
        headers: {
          'Content-type':'application/json;charset=utf-8'
        },
        body:JSON.stringify({
          email,
          password}),
      });
      const result = await response.json();
      if(result){
        alert('登录成功！');
        location.href = 'index.php';
      }else{
        alert('验证失败！');
        location.href = 'login.php';
      }
    }
  }

handle文档

session_start();
$users = require __DIR__. '/../../data/user.php';
$json = file_get_contents('php://input');
$newUser = json_decode($json, true);
$salt = 'dmegc';
$email = $newUser['email'];
$password = md5($salt . $newUser['password']);
$newArr2 = array_values(array_filter([1,2,3,4,5,6], function($item){
    return $item%2==0;
}));
$result = array_values(array_filter($users, function($user) use ($email, $password){
    return $user['password'] === $password && $user['email'] === $email;
}));
$flag = false;
if(count($result)===1){
    $flag = true;
    $_SESSION['name'] = $result[0]['name'];
}
echo json_encode($flag);

header登录按钮

<a href="login.php"><?php echo isset($_SESSION['name'])?$_SESSION['name'].'注销':'登录/注册'?></a>

总结：

挺简单的内容，可以讲的快一点；留出时间多实战。