What are the potential pitfalls of using magic constants like __FILE__ and __DIR__ to get folder names in PHP?

Magic constants like __FILE__ and __DIR__ can lead to potential pitfalls in PHP code because they provide absolute paths that may not always be consistent across different environments or servers. To avoid these issues, it's recommended to use the dirname(__FILE__) function to get the directory name of the current file in a more reliable way.

$folder_path = dirname(__FILE__);