Converts multi dimensional array / object to single depth array

flatten_array

function flatten_array($array, $parents = '')
{
	if ( !is_array($array) AND !is_object($array))
	{
		return array($parents . $array);
	}
	
	$array  = (array) $array;
	$flat 	= array();
	
	foreach ($array AS $k => $v)
	{
		if (is_numeric($k))
		{
			$k = '';
			$p = $parents;
		} else
		{
			$p = $parents . $k . '.';
			$flat[] = $parents . $k;
		}
		
		$flat = array_merge($flat,flatten_array($v,$p));
	}
	
	return $flat;
}