As of PHP 4.0.4, this function is an alias for
get_included_files()
In PHP 4.0.1pl2 and previous versions get_required_files() assumed that the required
files ended in the extension .php,
other extensions would not be returned. The array returned by
get_required_files() was an
associative array and only listed files included by require()
and
require_once().
See also: require(),
require_once(), include(),
include_once(), and
get_included_files().