Using `include once()`

# Mastering PHP File Inclusion with `include_once()`: The Definitive Guide Tired of PHP errors stemming from duplicate code inclusions? Do you want to write cleaner, more efficient, and maintainable PHP applications? Then you've come to the right place. In this comprehensive guide, we'll delve into the power of `include_once()`, a PHP construct that ensures a file is included only once, preventing code duplication and potential conflicts. This article is your one-stop resource for understandi