$sql="SELECT*FROM`likes`WHERE`pid`=$pid";$result=$conn->query($sql);if($result->num_rows>0){$likers=array();while($row=$result->fetch_assoc()){$likers[]=$row['uid'];echoimplode(",",$likers);}}else{return"Bethefirsttolikethisstatus...";}例如，如果查询结果为3行用户ID:21,20,44它应该显示:21,20,44但相反，它显示:2121,20,44看看它