CODEWITHSUNDEEP
phpvalidationsession
user4592091
user4592091

Reputation:

$_SESSION Variable Validation Leads to Blank PHP Page / No Content

Successful login on my login page should direct to a homepage (which it does - I double checked to see is the variables are set and they are when a correct username/password is entered). Otherwise, the login page should be private.

LOGIN PHP (works fine)

<?php
session_start();
require_once("../inc_files/Lesson_5_DB_Connection.php"); 
error_reporting(E_ALL);
ini_set('display_errors', 1);

    $error_message= "";
    $user_name = "";
    $user_password= "";
    $_SESSION['username']="";
    $_SESSION['employeeNumber']="";

    if (isset($_POST['submit'])) {

        $user_name = $_POST['user'];
        $user_password= $_POST['pass'];



        // ADD QUERY TO CHECK IF USER/PASS COMBO IS CORRECT
        if(!empty($user_name) && !empty($user_password)) {

        $query = "SELECT * FROM employees WHERE username='$user_name' and password='$user_password'";

        $result = mysqli_query($dbc, $query)
            or die ('Error querying username/password request');

            if(mysqli_num_rows($result) == 1) {

             while ($row = mysqli_fetch_array($result)) {
                $_SESSION['username'] = $row['username'];
                $_SESSION['employeeNumber'] = $row['employeeNumber'];
             }

                 header("Location: /LESSON5/3%20-%20HOMEPAGE%20:%20WELCOME.php");
                exit;

            } // end if rows

            else {
                $error_message = "You were not able to log in";
            } // end else

        // Direct to other webpage

        } // end query

    } // end isset
?>

The homepage should only be visible if the $_SESSION variables are set. If the user is not logged in (session variables not set) then the homepage should redirect to the login page. Now, I added a validation to see if variables are not set (!isset). This validation keeps the page from showing any content. When I delete this validation the HTML shows up fine. When I delete the validation and echo the variable values I get the values returned.

It's just the if(!isset($_SESSION['username']) && !isset($_SESSION['employeeNumber']) keeping from showing any content on the page.

HOMEPAGE

<?php
    session_start();
    require_once("../inc_files/Lesson_5_DB_Connection.php");

    if(!isset($_SESSION['username']) && !isset($_SESSION['employeeNumber']) {

        header("Location: /LESSON5/1%20-%20LOGIN.php");
    }
?>

    <!DOCTYPE html>
    <head>
        <title></title>
          <meta charset="utf-8">
          <link type="text/css" rel="stylesheet" href="/LESSON5/5_Signup_CSS.css">
    </head>

    <body>
        <p><span id="logout"><a href="/LESSON5/4%20-%20LOGOUT%20PAGE.PHP">Logout</a></span></p>
        <hr>
        <h1>Welcome to my homepage! <br> You have successfully logged in.</h1>

    <?php
        mysqli_close($dbc);
    ?>

    </body>

    </html>

Is there any reason why that validation is keeping the PHP from showing the HTML(if user login is correct) or redirect the page(if user not logged in)?

Upvotes: 2

Views: 860

Answers (1)

Death-is-the-real-truth
Death-is-the-real-truth

Reputation: 72289

Basically error is in your php if condition. One parenthesis is missing. change like this:-

if(!isset($_SESSION['username']) && !isset($_SESSION['employeeNumber']))

Note:- try to add error_reporing at the top of your all php pages so that you can get php errors if happen. check the manual of error_reporing on php site. Thanks.

If you are working on local server you can change your php.ini settings for this.

You can get how to change php.ini setting on google easily.

ini_set is function of php is for this purpose if you want to do it programmatically not with php.ini directly.

Upvotes: 1

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