Agfdhyk

When user trying to edit his blog post and left some fields empty, he should get empty fields error, but, code that should do that get ignored and i get completely different error message instead.

My question: how to display empty fields error message properly?

Code snippets from editpost.php file:

1. Checking for empty fields:

// Check for empty fields

if (empty($title) || empty($body)) {

    // Save correct data into fields

    header('Location: editpost.php?error=emptyeditpostfield&title='.$title.'&body='.$body);

    // Stop script

    exit();

} else {

    $query = "UPDATE posts SET title='$title', body='$body' WHERE id = {$update_id}";

}

2. Desired message:

<!-- Check if user has rights to editing post -->

    <?php if (isset($_SESSION['id'])) : ?>

        <?php if ($_SESSION['name'] == $post['author']) : ?>

            <div class="container">

                <h1>Edit Post</h1>

                <?php 

                    // Message I want to show

                    if (isset($_GET['error'])) {

                        if ($_GET['error'] == 'emptyeditpostfield') {

                            echo '<p class="text-warning">Fill in all fields!</p>';

                        }

                    }

                ?>

                <!-- Edit post form... -->

3. Message I receive:

<!-- /Edit post form... -->

            </div>

        <?php else : header('Location: index.php?error=accessdenied'); exit(); // Message I got ?>

        <?php endif; ?>

    <?php else : header('Location: index.php?error=accessdenied'); exit(); ?>

    <?php endif; ?>

Edited (Nov 30).

4. Code that is a part of this issue as well:

    // Get ID

    $id = mysqli_real_escape_string($conn, $_GET['id']);



    // Create Query

    $query = "SELECT * FROM posts WHERE id = $id";



    // Get Result

    $result = mysqli_query($conn, $query);



    // Fetch Data

    $post = mysqli_fetch_assoc($result);

    // var_dump($posts);



    // Free Result

    mysqli_free_result($result);



    // Close Connection

    mysqli_close($conn);

Picture 1. Warnings after Submit with empty fields.

Picture 2. Edit post page.

You're redirecting the user when the fields are not filled. You do not save the post therefore the $post is not filled with the data of your form. $post['author'] does not exist.

To solve this issue:

1. In first code snippet need store post id in session as follow:

// Store post id in session

session_start();

$_SESSION['update_id'] = $update_id;

2. In fourth code snippet need check if session has id as follow:

// Get ID

if (isset($_SESSION['update_id'])) {

    $id = $_SESSION['update_id'];

} else {

    $id = $_GET['id'];

}

Now post id is stored in session and it's possible to retrieve data from database again after redirection.