<?php $conn = mysql_connect("localhost","root","1234"); mysql_select_db("laaho_caike"); $option = getTree(0); $option = "<select name='term'>" . $option . "</select>"; echo $option; function getTree($id,$spac=0) { //static $str; $spac = $spac + 2; static $str; $sql = "select * from videoterm where parent_id='" . $id . "'"; $res = mysql_query($sql); //$arr = mysqli_fetch_assoc($res); while ($arr=mysql_fetch_assoc($res)) { $str .= "<option value=" . $arr['Id'] . ">" . str_repeat(' ',$spac) . "|--" . $arr['termname'] . "</option>"; getTree($arr['Id'],$spac); } return $str; } ?>
效果如图
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