怎么样通过php根据用户名和手机号查询是否存在手机号码？

public function CheckMobileUser($data){
  $sql='select phone,username from wlzbpre_user where phone="'.$data['phone'].'" or username="'.$data['phone'].'" and status="1" limit 1';
  $phone=M()->query($sql);
  $phone =$phone[0]['phone'];
  $username=$phone[0]['username'];
  if(empty($phone)){
   $remark=array(
    'RespCode'=>'081',
    'RespDesc'=>'手机号/用户名不存在',
    'AcctDetails'=>array('token'=>''),
   );
  }else{
   $remark=array(
    'RespCode'=>'000',
    'RespDesc'=>'手机号已存在',
    'AcctDetails'=>array('phone'=>$phone,'username'=>$username),
   );
  }
  return $remark;
 }