Я разработал сайт в php.Index.php является формой входа.После входа в dashboard.php идет.Но когда я нажимаю кнопку возврата в браузере, он перенаправляет на страницу входа.Как это предотвратить.Если есть какое-либо решение, пожалуйста, сообщите.Заранее спасибо.Коды приведены ниже:
index.php
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="style.css">
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
</head>
<body style="background-image: url('https://www.pixelstalk.net/wp-content/uploads/2016/05/HD-Black-Picture.jpg');">
<section id="login">
<div class="container">
<div class="row">
<div class="col-sm-2"></div>
<div class="col-sm-8 col1">
<div class="row">
<div class="col-sm-7 co2">
<h1 class="h1">Orbit Shifters Employee Site</h1>
<h2 class="h2">Login Here <i class="fas fa-long-arrow-alt-right"></i></h2>
</div>
<div class="col-sm-5 co1">
<form method="post" action="func.php">
<div>
<input type="text" name="username" class="i1" placeholder="Enter Your Username">
</div>
<div>
<input type="password" name="password" class="i1" placeholder="Enter Your Password">
</div>
<div>
<input type="submit" name="submit" class="btn btn1">
</div>
</form>
</div>
</div>
</div>
<div class="col-sm-2"></div>
</div>
</div>
</section>
</body>
</html>
func.php
<?php
session_start();
$con=mysqli_connect("localhost","root","","login");
$connect = new PDO('mysql:host=localhost;dbname=login', 'root', '');
if(isset($_POST['submit'])){
$username=$_POST['username'];
$password=$_POST['password'];
$query="select * from signup where username='$username' and password='$password';";
$result=mysqli_query($con,$query);
$row=mysqli_fetch_assoc($result);
if(mysqli_num_rows($result)==1)
{
$_SESSION["username"] = $username;
$_SESSION['status']="Active";
header("Location:dashboard.php?name=".$row['name']);
exit;
}
else{
echo "<script>alert('Enter Correct Details!!')</script>";
echo "<script>window.open('index.php', '_self')</script>";
}
}
?>
dashboard.php
<?php
session_start();
if($_SESSION['status']!="Active")
{
header("location:index.php");
}
else{
$name=$_GET['name'];
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="style.css">
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
</head>
<body style="background:url(https://i.pinimg.com/originals/e5/f3/af/e5f3af2b9186af6e86187c84f4ad930e.jpg);">
<nav class="navbar navbar-inverse">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="dashboard.php?name=<?php echo $name; ?>">Dashboard</a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav navbar-right">
<li class="li1"><a href="logout.php"><span class="glyphicon glyphicon-log-in"></span> Logout</a></li>
</ul>
</div>
</div>
</nav>
<section id="dashboard">
<div class="container">
<div class="row ro1">
<p class="p1"> Hello <?php echo $name; ?>, Welcome to Orbit Shifters EMployee Site.</p>
</div>
<div class="ro1">
<div class="col-sm-4 col2">
<a href="project1.php?name=<?php echo $name; ?>"><button class="btn btn2">Project 1 <br>Report <br>Submission</button></a>
</div>
<div class="col-sm-4 col2">
<button class="btn btn2">Project 2 <br>Monthly Report <br>Submission</button>
</div>
<div class="col-sm-4 col2">
<button class="btn btn2">Project 3 <br>Feedback <br>Submission</button>
</div>
</div>
</div>
</section>
</body>
</html>
<?php
}
?>
выход.php
<?php
session_start();
session_destroy();
$_SESSION = array();
unset($_SESSION['username']);
unset($_SESSION['status']);
header("Location:index.php");
?>