Question

当输入正确的ID和密码时，login.php页面会成功重定向到主页。现在，我想在输入错误的ID或密码时在login.php页面上显示错误消息。这是我的代码 -

login_save.php

<?php
function SignIn($loginname,$pass) {
include '../../common/common.php';
//require_once '../../common/createdbconn.php';

$login_id='';
$login_status='';
$error_message= '';

if(!empty($loginname) && !empty($pass)){ //checking the 'user' name and password, is it empty or have some text 
		
		$login_id=validate_login($loginname,$pass);		
		if ($login_id != '') {		
		
			header("location:homeaction.php?session_id=".session_id());
		}
		
		else {
			// invalid user check
			$error_message=INVALID_USERNAME;
			//$_SESSION['error_message']=$error_message;
			$login_status=$error_message;
			session_unset();
			session_destroy();
		}		
		}
else {
		//empty check
		$error_message=NO_USERNAME_PASSWORD;
		//$_SESSION['error_message']=$error_message;
		$login_status=$error_message;
	}
	return $login_status;
	
}

function validate_login($loginname,$pass) {
	require '../../common/createdbconn.php';
	// validate user
	$sql="SELECT id, fullname, designation_id from m_user where login_name='$loginname' and password='$pass'";
	//$sql="SELECT mu.id as id, mu.fullname as fullname, mu.office_id as office_id, xurm.role_id as role_id from m_user mu, x_user_role_mapping xurm where mu.id = xurm.user_id and mu.login_name='$loginname' and mu.password='$pass'";
	$result=mysqli_query($conn,$sql);
	$login_id=mysqli_fetch_row($result);
	session_start();
	$sessionid = session_id();
	$sql_sessionid="update m_user set session_id='$sessionid' where login_name='$loginname'";
	$result=mysqli_query($conn,$sql_sessionid);
	$_SESSION['login_id']=$login_id[0];
	$_SESSION['fullname']=$login_id[1];
	$_SESSION['logged_in']=true;
	$_SESSION['loginname']=$loginname;
	return $login_id[0];
}	

?>

login_action.php

<?php 	
require_once '../../common/createdbconn.php';
require_once '../model/login_save.php';


$loginname=$_POST["user"];
$password=$_POST["pass"];
$pass=md5($password);
$login_status='';

$login_status=SignIn($loginname,$pass);

if ($login_status=='') { // Validation passed
	session_start(); //starting the session for user profile page 	
}

else  {$error ="Username or Password is invalid";
	   header("location:../view/login.php?login_status=$login_status");
	   session_destroy();
}
?>

的login.php

<!DOCTYPE html>

<?php 
require '../../common/createdbconn.php';
?>

<html>
	<head>
	
		<meta charset="UTF-8">
		<title>CBS HELPDESK,ASSAM CIRCLE</title>
		<link rel="icon" href="../../images/IP.png" type="image/png" sizes="100x56">
		<link rel="stylesheet" href="../../css/style.css">
	</head>
	<body>
	<img src="../../images/indiapost.jpg" style="width:1600px;height:120px;">
		<h1>Welcome to Circle Processing Centre-Assam</h1>
		
  
		<div class="wrapper">
			<div class="container">
			
				<h2>Login to Continue</h2>


				<form method="post" action="../controller/login_action.php" class="form">				
					<input id="user" name="user" type="text"  placeholder="Enter Your UserID">
					<input id="pass" name="pass" type="password" placeholder="Enter Your Password">
					<button id="login" name="login"  type="submit">Login</button>
				</form>
			</div>
		</div>
	</body>
</html>

如何在放入错误的ID或密码时显示登录错误消息

0 个答案: