How can duplicate forum threads on the same topic be avoided in PHP forums?

To avoid duplicate forum threads on the same topic in PHP forums, you can implement a check before creating a new thread to see if a thread with the same topic already exists. This can be done by querying the database to search for existing threads with the same topic. 

// Check if a thread with the same topic already exists
$existing_thread = $pdo->prepare("SELECT * FROM threads WHERE topic = :topic");
$existing_thread->bindParam(':topic', $new_topic);
$existing_thread->execute();

if($existing_thread->rowCount() > 0){
    // Thread with the same topic already exists, display an error message
    echo "Thread with the same topic already exists.";
} else {
    // Create a new thread with the unique topic
    $create_thread = $pdo->prepare("INSERT INTO threads (topic, content) VALUES (:topic, :content)");
    $create_thread->bindParam(':topic', $new_topic);
    $create_thread->bindParam(':content', $new_content);
    $create_thread->execute();
    echo "Thread created successfully.";
}

Keywords

PHP forum duplicate threads topic prevention

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