我正在学习PHP并开始使用课程。我正在尝试创建登录系统但无法从数据库验证用户名和密码。当我点击登录时，它不会让我进去。我试图通过echo和die()检查我在一个函数内的距离，我被_ login_action()中的_check_db check_db（）所困，<?php
class adminLogin
{
private $_host="localhost";
private $_username="root";
private $_password="";
private $_database="sms";
private $_conn;
private $_loginusername;
private $_loginpassword;
public function __construct()
{
session_start();
if(isset($_POST['loginusername'])) {
$this->_loginusername = $_POST['loginusername'];
}
if(isset($_POST['loginpassword'])) {
$this->_loginpassword = $_POST['loginpassword'];
//get the username and password
}
}
protected function _dbConnect()
{
try {
$this->_conn = new PDO("mysql:host=$this->_host;dbname=$this->_database", $this->_username, $this->_password);
return $this->_conn;
}
catch (PDOException $e)
{
echo "Error: " . $e->getMessage();
}
}
public function authenticate()
{
//first check whether session is set or not
if(!isset($_SESSION['admin_login']))
{
//check the cookie
if(isset($_COOKIE['loginusername']) && isset($_COOKIE['loginpassword']))
{
//cookie found, is it really someone from the
if($this->_check_db($_COOKIE['loginusername'], $_COOKIE['loginpassword']))
{
$_SESSION['admin_login'] = $_COOKIE['loginusername'];
header("location: /views/adminView.php");
die();
}
else {
header("location: /index.php");
die();
}
}
else {
header("location: /index.php");
die();
}
}
}
/**
* Check for login in the action file
*/
public function login_action()
{
//insufficient data provided
if ($this->_loginusername == '' || $this->_loginpassword == '')
{
header("location: /index.php");
}
//check the database for username
if ($this->_check_db($this->_loginusername,$this->_loginpassword))
{
$_SESSION['admin_login'] = $this->_loginusername;
//ready to login
//check to see if remember, ie if cookie
if (isset($this->$_POST['rememberlogin'])) {
//set the cookies for 1 day, ie, 1*24*60*60 secs
//change it to something like 30*24*60*60 to remember user for 30 days
setcookie('loginusername', $this->_loginusername, time() + 30 * 24 * 60 * 60);
setcookie('loginpassword', $this->_loginpassword, time() + 30 * 24 * 60 * 60);
} else {
//destroy any previously set cookie
setcookie('loginusername', '', time() - 1 * 24 * 60 * 60);
setcookie('loginpassword', '', time() - 1 * 24 * 60 * 60);
}
header("location: /views/adminView.php");
}
else
{
header("location: /index.php");
}
die();
}
private function _check_db($passedusername,$passedpassword)
{
$this->_dbConnect();
$checkAdminQuery = $this->_conn->prepare("SELECT * FROM `admins` WHERE `username` = ?");
$checkAdminQuery->execute(array($passedusername));
$row = $checkAdminQuery->fetch();
if ($row['username'] == $passedusername && $row['password'] == $passedpassword)
{
$this->_conn = null; //close the connection
return true;
}
else
{
return false;
}
}}?>
没有返回某些内容，或者我的陈述中出现了问题。
我的班级adminLoginModel.php：
<div class="login-panel panel panel-default">
<div class="panel-heading">
<h3 class="panel-title">Please Sign In</h3>
</div>
<div class="panel-body">
<form role="form" id="loginForm" method="post" action="/controllers/mainController.php">
<fieldset>
<div class="form-group">
<input id="loginusername" class="form-control" placeholder="Username" name="loginusername" type="text" autofocus>
</div>
<div class="form-group">
<input id="loginpassword" class="form-control" placeholder="Password" name="loginpassword" type="password" value="">
</div>
<div class="checkbox">
<label for "rememberlogin">
<input name="rememberlogin" id="rememberlogin" type="checkbox" value="Remember Me">Remember Me
</label>
</div>
<!-- Change this to a button or input when using this as a form -->
<button class="btn btn-lg btn-success btn-block" value="submit" name="login" onclick="return loginCheck()" >Login</button>
</fieldset>
</form>
</div>
</div>
登录表单：
if(isset($_POST['login']))
{
include_once(ROOT.'/models/adminLoginModel.php');
$admin = new adminLogin();
$admin->login_action();
}
在控制器中有一点代码：
"<li class='Item show'><a class='Link' onclick='console.log(\"hello\")'>click</a></li>"