php中点击网页不跳转执行程序

if($code[‘result_code‘] !=‘FAIL‘)
    {
        echo "<script type=‘text/javascript‘>
        alert(‘退款成功,请耐心等待‘);history.back();
    </script>";
        //echo "退款成功";
        ;
    }else{
        echo "<script type=‘text/javascript‘>
        alert(‘退款失败,请联系客服~~~‘);history.back();
    </script>";

    }