Are there alternative methods or variables in PHP, such as $_SERVER["DOCUMENT_ROOT"], that can be more reliable for determining directory paths in scripts?

When determining directory paths in PHP scripts, using $_SERVER["DOCUMENT_ROOT"] is a common method, but it may not always be reliable due to server configurations. An alternative approach is to use the __DIR__ constant, which provides the directory of the current script file. This method is more dependable and ensures accurate directory paths in your scripts.

$directory_path = __DIR__;
echo $directory_path;