全路径无限分类下拉列表的实现

最终效果图：

代码详情：

include('db.inc.php');
function likecate($path=''){
sql = "select id,catename,path,concat(path,',',id) as fullpath from likecate order by fullpath asc";
$res = mysql_query($sql);
$result = array();
while($row = mysql_fetch_assoc($res)){
$deep = count(explode(',',trim($row['fullpath'],','))); //取数组的深度,去除逗号
$row['catename'] = str_repeat('  ',$deep).'|--'.$row['catename'];
$result[] = $row;
}
return $result;
}
$res = likecate();
echo "<select name= cate>";
foreach ($res as $key => $value) {
echo "<option> {$value['catename']}</option>";
}
echo "</select>";
print_r($res);