仅当用户登录php时才需要显示页面

Question

Sorry for a duplicate question, but its not working for me; 对不起，我有一个重复的问题，但对我不起作用；

access page only if logged in with php 仅在使用php登录时访问页面

i have to access display.php page if someone loggedin, if they enter the url directly it need to redirect to login.php page, i tried sessions but its not working for me, please help me to debug it. 如果有人登录，我必须访问display.php页面，如果他们直接输入url，则需要重定向到login.php页面，我尝试了会话，但它对我不起作用，请帮助我进行调试。

display.php Display.php的

    <?php
    session_start();
            if(!isset($_SESSION['loggedin']))
            {
                  header("location: login.php");
            }
    $conn=mysqli_connect("localhost","root","zaq12345","testdb");
    if(!$conn)
    {
    die("Connection failed: " . mysqli_connect_error());
    }
    $disp = "select * from formdata order by user_id desc";
    $result = mysqli_query($conn,$disp);
    ?>
           <button onclick="location.href='formnew1.html';">Add</button>
           <table border="2" cellpadding="0" cellspacing="0">
                  <tr>
                         <th> ID </th>
                         <th> Name </th>
                         <th> Email </th>
                         <th> Age </th>
                         <th> Gender </th>
                         <th> Address </th>
                         <th> City </th>
                         <th> Skills </th>
                         <th>Action</th>
                  </tr>
                  <?php
                         //$rows = mysqli_fetch_assoc($result);
                          while ($row = $result->fetch_assoc())
                          {
                                $id = $row['user_id']; ?>
                                <tr>
                                <td><?php echo $row['user_id']?> </td>
                                <td><?php echo $row['name'] ?></td>
                                <td><?php echo $row['email']?></td>
                                <td><?php echo $row['age']?></td>
                                <td><?php echo $row['gender']?></td>
                                <td><?php echo $row['address']?></td>
                                <td><?php echo $row['city']?></td>
                                <td><?php echo $row['skill']?></td>
                                <td>
                                <a id="edit" href="edit1.php?id=<?php echo $row['user_id']; ?>">Edit</a>
                                <a href="#" id= "<?php echo $row['user_id'] ?>" onclick="deleteRow(this)">Delete</a>
                                </td>
                                </tr>
                     <?php  }  ?>  
           </table>
          <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
           <script>
           function deleteRow(obj){
                  conf=confirm('Are you sure to delete the Data');
                  if(conf){
                         var tr = $(obj).closest('tr');
                         $.post("delete1.php", {id: obj.id}, function(result){
                               tr.fadeOut('slow', function(){
                               $(obj).remove();
                               });
                         });
                  }
           }
    </script>
    <?php
    if (isset($_SESSION['success']))
    {

            echo '<script> alert("Data Added Successfully");</script>';
            }
    else if (isset($_SESSION['fail'])){
           echo '<script> alert("Failed to Store");</script>';
           //header("Location: /training/formnew.html");
    }
    mysqli_close($conn);
    ?>

login.php 的login.php

<?php session_start(); ?>
<!DOCTYPE html>
<html>
     <head>
     <style>
        div {
                color: rgb(255,0,0);
            }
       form {
               max-width: 425px;
               margin: 10px auto;
               padding: 10px 20px;
               background: #ff994580;
               border-radius: 10px;
            }
     fieldset {
               margin-top: 100px ;
               margin-bottom: 500px;
               border: none;
               }
     h2        {
            margin: 0 0 30px 0;
            text-align: center;
            font-family: 'Calibri';
            font-size: 40px;
            font-weight: 300;
                }
     label        {

            font-family: 'Calibri';
            font-size: 16px;
            font-weight: 50;
                }
    .submit {
    background-color: #4CAF50;
    border-radius: 10px;
    color: white;
    padding: 10px 40px 10px;
    text-align: center;
    font-size: 16px;
    cursor: pointer;
}
.reset {
    background-color: #ff3333;
    border-radius: 10px;
    color: white;
    padding: 10px 40px 10px;
    text-align: center;
    font-size: 16px;
    cursor: pointer;
}
    </style>
     </head>
<body>
     <fieldset>
<form id="myform" name="myform" method="POST" action="validate.php">
  <H2> LOGIN </H2>
  <table width="60%" cellpadding="10">
        <tr>
            <td>
                <label>User ID</label>
            </td>
            <td>
                <input type="text" id="user_id" name="user_id"placeholder="Enter your User ID" required="required"/> 
            </td>
        </tr>
        <tr>
            <td>
                <label>User Name</label>
            </td>
            <td>
                <input type="text" id="user_name" name="user_name" placeholder="Enter your Username" required="required"/>
            </td>
        </tr>
        <tr>
            <td>
                <label>Password</label>
            </td>
            <td>
                <input type="password" id="password" name="password" placeholder="Enter your Password" required="required"/>
            </td>
        </tr>       
        <tr>
            <td>
                <input type="submit" class="submit" name="submitbtn" value="Login">
            </td>
            <td>
                <input type="reset" class="reset"/>
            </td>
        </tr>
    </table>
</form>
</fieldset>
</script>
</body>
</html>

validate.php validate.php

<?php
session_start();
$conn=mysqli_connect("localhost","root","zaq12345","testdb");
if($_SERVER['REQUEST_METHOD'] == 'POST')
{
     $userid=$_POST['user_id'];
     $username=$_POST['user_name'];
     $password=$_POST['password'];
     $qz = "SELECT * FROM userdata WHERE user_id = '$userid' AND user_name = '$username' AND password = '$password'";
     $result=mysqli_query($conn,$qz);
     if(mysqli_num_rows($result) == 1 )
     {
            $_SESSION['loggedin'] = true;
            $_SESSION['user_id'] = $userid;
            header('location: display1.php');  
     }
     else{
          $_SESSION['loggedin'] = false;
          echo '<script> alert("ERROR: Please Check Credentials OR SignUp!!!"); window.location.href="login.php"; </script>';
     }
}
mysqli_close($conn);
?>

Answer 1

Either remove the line $_SESSION['loggedin'] = false; 要么删除行$_SESSION['loggedin'] = false; in your validate.php file. 在您的validate.php文件中。

Or change the if statement in your display.php file to be 或将display.php文件中的if语句更改为

if (!isset($_SESSION['loggedin'] || !$_SESSION['loggedin'])

You are setting the loggedin to be false, so when you call isset it returns true, because it is set even though it is set to false. 您将loggedin设置为false，因此在调用isset它会返回true，因为即使已将其设置为false，它也会被设置。

仅当用户登录php时才需要显示页面

问题描述

1 个解决方案

解决方案1
0 已采纳 2017-04-12 13:24:03

仅当用户登录php时才需要显示页面

问题描述

1 个解决方案

解决方案1 0 已采纳 2017-04-12 13:24:03

解决方案1
0 已采纳 2017-04-12 13:24:03