Returns an array of the names of all files that have been included using include(), include_once(), require() or require_once().
Files that are included or required multiple times only show up once in the returned array.
Note: Files included using the auto_prepend_file configuration directive are not included in the returned array.
Note: In PHP 4.0.1pl2 and previous versions get_included_files() assumed that the required files ended in the extension .php; other extensions would not be returned. The array returned by get_included_files() was an associative array and only listed files included by include() and include_once().
See also include(), include_once(), require(), require_once(), and get_required_files().