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php递归实现无限分类生成下拉列表的函数

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Release: 2016-06-06 20:34:51
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php自定义函数之递归实现无限分类生成下拉列表,这样可以提高效率,不用每次都从数据库读取数据。

复制代码 代码如下:


/*—————————————————— */
//– 递归实现无限分类生成下拉列表函数
//– $tpl->assign('sort_list',createSortOptions ());
//– $tpl->assign('sort_list',createSortOptions ($sort_id));
/*—————————————————— */
function createSortOptions ($selected=0,$parent_id=0,$n=-1)
{
global $db;
$sql = "SELECT * FROM `@__article_sort` WHERE `parent_id` = '{$parent_id}'";
$options = ";
static $i = 0;
if ($i == 0)
{
$options .= '\n";
$options .=createSortOptions ($selected,$row['sort_id'],$n);
}
}
return $options;
}

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