$id=$_POST['um1-search-input'];
@ $db = new mysqli('localhost', 'root', 'abcde', 'classroom');
if (mysqli_connect_errno()) {
echo '连接错误，请重试！';
exit;
}
$query = "select bd_name from buildings where bd_name=".$id."";
$result = $db->query($query);
$row = $result->fetch_assoc();
$bd_name=$row['bd_name'];

求大神帮一下忙啊、

求大神帮一下忙啊、