How does the phpBB forum software handle preventing users from submitting duplicate posts?

To prevent users from submitting duplicate posts in phpBB forum software, we can implement a check to compare the content of the new post with existing posts to see if it already exists. If a duplicate post is detected, we can display an error message to the user and prevent the post from being submitted. 

// Check for duplicate posts before submitting
$existingPosts = $db->sql_query('SELECT post_text FROM ' . POSTS_TABLE);
while ($row = $db->sql_fetchrow($existingPosts)) {
    if ($row['post_text'] == $newPostText) {
        $error[] = 'Duplicate post detected. Please try again.';
        break;
    }
}

// If no duplicate posts found, continue submitting the post
if (empty($error)) {
    submitPost($newPostText);
} else {
    // Display error message to the user
    foreach ($error as $errorMsg) {
        echo $errorMsg;
    }
}

Keywords

phpBB forum software duplicate posts prevention user submission

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