ถามเรื่องโค้ด php บันทึกข้อมูลลงฐานข้อมูล mysql ค่ะ

<?php if

($_SESSION['usern']) { if($_SESSION['user_id'] !== $row['id']) { ?>
						<div 

id="message_status"></div>
						<div 

id="message_form">
						<form 

action="" method="POST" id="ask_form">
						<textarea 

class="form-control" rows="2" id="message" 

name="message"></textarea>
						<div 

class="pull-right" style="margin-top:5px;">
							

<input type="checkbox" name="anonymous"> ไม่แสดงชื่อ&nbsp;&nbsp;&nbsp;
							

<button type="button" class="btn btn-primary btn-sm" onclick="ask

();">ถาม !</button>
						</div>
						<input 

type="hidden" value="<?php echo $row['id']; ?>" name="uid">
						</form>
						<br>
						</div>
						<?php } } ?>

<?php
ob_start();
session_start();
include("../inc/config.php");
$web = mysql_fetch_array(mysql_query("SELECT * FROM settings ORDER BY id DESC LIMIT 1"));
$lang_path = '../';
include("../inc/language.php");
include("../inc/functions.php");
if(!$_SESSION['usern']) { die("Hacking attempt!"); }
$message = protect($_POST['message']);
$uid = protect($_POST['uid']);
$user_id = $_SESSION['user_id'];
$anonymous = protect($_POST['anonymous']);
if($anonymous) {
	$anon = 1;
} else {
	$anon = 0;
}
$time = time();

if(empty($message)) { echo error($lang['ask_error']); }
elseif(empty($uid)) { echo error("Hacking attempt!"); }
else {
	$insert = mysql_query("INSERT questions (user_id,from_id,question,answer,answered,time,anonymous) VALUES ('$uid','$user_id','$message','','0','$time','$anon')");
	echo '<div class="col-lg-12">
			<center>
			<h3><i class="fa fa-check"></i> '.$lang[ask_success].' '.idinfo($uid,"name").'</h3>
			</center>
			<br>
		</div>';
}
?>