What are some best practices for handling user actions like deleting and creating news articles in an admin section of a PHP script?

When handling user actions like deleting and creating news articles in an admin section of a PHP script, it is important to validate user input to prevent SQL injection attacks and ensure data integrity. Additionally, implement proper error handling to provide feedback to the user in case of any issues during the process. Finally, consider implementing user authentication and authorization to restrict access to these actions to authorized users only.

// Example code snippet for deleting a news article
if(isset($_POST['delete_article_id'])){
    $article_id = $_POST['delete_article_id'];
    
    // Validate user input
    if(!is_numeric($article_id)){
        die("Invalid article ID");
    }
    
    // Perform deletion query
    $sql = "DELETE FROM news_articles WHERE id = $article_id";
    $result = mysqli_query($conn, $sql);
    
    if($result){
        echo "Article deleted successfully";
    } else {
        echo "Error deleting article";
    }
}