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<?phpfunction getChildren($cat) {	$ret = array();	$query = mysql_query("SELECT cat_id FROM cubecartstore_category where cat_father_id IN (".$cat.")");	if ($query = false) {		die('SQL ERROR');	}	$kids = array();	while($children = mysql_fetch_array($query,MYSQL_ASSOC)) {		$kids[] = $children['cat_id'];	}	if (count($kids) > 0) {		$searchids = implode(',',$kids);		$ret = $ret + getChild($searchids);	}	return $ret;}print_r(getChildren(0));?>