Description:
------------
old:
Usage: array array_values ( array input )
Purpose: Return all the values of an array 

new suggestion:
Usage: array array_values ( array input, [mixed key] )
Purpose: Return all the values of an array 

key default to null, which is same as old array_values
if key is_int or is_string

it act like this:
function array_values($input, $key)
{
	$ret = array();
	foreach ($input as $value) {
		$ret[] = $value[$key];
	}
	return $ret;
}

this is very useful to collect ids
e.g.:
$idrows = db_query_all_rows("select id from table1");
$ids = implode(',', array_values($idrows, 'id'));
$myrows = db_query_all_rows("select .... from table2 where id IN($ids)");
(db_query_all_rows is custom function which fetch all rows of query result)
thanks