PHP 无限极分类下拉列表实现

/**
 * @param 递归 实现下拉列表 分类 
 */

include('db.inc.php');

function getList($pid = 0,&$result = array(), $spac = 0){
    $spac = $spac + 2;
    $sql = "SELECT * FROM DEEPCATE WHERE pid = $pid";
    $res = mysql_query($sql);
    while($row = mysql_fetch_array($res)){
        $row['catename'] = str_repeat('/**
 * @param 递归 实现下拉