What potential issues can arise when using different paths for determining the current page in PHP?

Potential issues that can arise when using different paths for determining the current page in PHP include inconsistency in page detection, which can lead to errors in navigation or functionality. To solve this, it is recommended to use a standardized method for determining the current page, such as checking the `$_SERVER['REQUEST_URI']` variable.

$current_page = $_SERVER['REQUEST_URI'];