ขอรบกวนถามหน่อยนะค่ะ พอดีตอนนี้ทำเว็บบอร์ดอยู๋ค่ะ แต่ติดปัญหานิดหน่อย

<?php
require_once(dirname(__FILE__).'/animatedcaptcha.class.php');

$user_guess='';
if (isset($_POST['user_guess'])) {
	$user_guess=$_POST['user_guess'];
}

$img=new animated_captcha();
$img->session_name='my_turing_test';
$img->magic_words('i am cool');

$valid=$img->validate($user_guess);
?>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">


		
		<?php 

	include("../Conf/config.inc.php");
	include("../Conf/function.inc.php");
	
	
				//เก็บค่าไว้ก่อน เพื่อส่งค่ากลับ
   
	$_SESSION['ckDetail'] = stripslashes($_POST['answerW1']);
	$_SESSION['ckName'] = htmlspecialchars(strip_tags($_POST['nameW2']));
	$_SESSION['ckEmail'] = htmlspecialchars(strip_tags($_POST['emailW4']));
	//$_SESSION['tel'] = $_POST['tel'];
			
		
		
		  //*****************************************
	
	$num = $_POST['num'];
	$code = $_POST['code'];
		$w_id=$_GET['w_id'];
	$image = $_GET['image'];
    $answerW1 = $_POST['answerW1'];
	$nameW2 = $_POST['nameW2'];
	$emailW4 = $_POST['emailW4'];
	
	
	$tel = $_POST['tel'];
	//$email = $_POST['email'];
	$emailK = $_POST['emailK'];
	$mail = $_POST['mail'];
	$select = $_POST['cat'];
	$ip = $_POST['ip'];
	
	//$w_status = $_POST['w_status'];
	
	$a_date = date(Ymd);
	//...................เช็ครหัสความปลอดภัย...............................................
if ($user_guess=='') {
?>
<script language="JavaScript">
		alert("กรุณากรอกรหัสความปลอดภัย");
		window.history.go(-1);
	</script>
	<?
	
} else if ($valid) {

	
 		 
	$userfile_name = $_FILES['image']['name'];
	$userfile_tmp = $_FILES['image']['tmp_name'];
	$userfile_size = $_FILES['image']['size'];
	$userfile_type = $_FILES['image']['type'];
   

  if($userfile_name!=""){

    $prefix = "small_"; // the prefix to be added to the original name
	$maxfile = "300000";//500K
	/********* การ  Upload รูปและ Resize *********/		
	if (isset($_FILES['image']['name'])) 
	{
		//ตรวจสอบขนาดและชนิด
       if ($userfile_size >= $maxfile){
			$msg = "Size not over ". byte_format($maxfile);
	
?>
		<script language="JavaScript">
			alert("<?php echo $msg; ?>");
			history.go(-1);
		</script>
<?php
			exit();		
		}
		

	$size_w = 500; 
	$size_h = 500; // the thumbnail height
	$filedirProduct = "../images/board/"; // the directory for the original image
	$thumbdirProduct = "../images/board/"; 


    if (isset($_FILES['image']['name']))
           { 

			// เริ่มการ  Upload รูปและ Resize
		$prod_img = $filedirProduct.$userfile_name;
		$prod_img_thumb = $thumbdirProduct.$prefix.$userfile_name;
		move_uploaded_file($userfile_tmp, $prod_img);
		$sizes = getimagesize($prod_img);
        if($sizes[1]>$sizes[0]){
		$aspect_ratio = $sizes[1]/$sizes[0]; 
		//$aspect_ratio1 = $sizes[0]/$sizes[1]; 

		     if ($sizes[1] <= $size_h){
			$new_width = $sizes[0];
			$new_height = $sizes[1];
		     }else{
			$new_height = $size_h;
			 $new_width = abs($new_height/$aspect_ratio);
		     }
		
		}else{
		
		$aspect_ratio = $sizes[0]/$sizes[1]; 
		
		   if ($sizes[0] <= $size_w){
			$new_width = $sizes[0];
			$new_height = $sizes[1];
		     }else{
			$new_width = $size_w;
			 $new_height = abs($new_width/$aspect_ratio);
			
		     }
		}	 
		
	     $destimg=imagecreatetruecolor($new_width,$new_height) or die('Problem In Creating image');
		  
		  if($_FILES["image"]["type"] == "image/gif"){
                
				$srcimg=imagecreatefromgif($prod_img) or die('Problem In opening Source Image');
				imagecopyresampled($destimg, $srcimg, 0, 0, 0, 0, $new_width, $new_height, $sizes[0], $sizes[1]) or die('Problem In resampling');
				imagegif($destimg,$prod_img_thumb,100) or die('Problem In saving');
				imagedestroy($destimg);
            }
             elseif(($_FILES["image"]["type"] == "image/jpeg")|| ($_FILES["image"]["type"] == "image/pjpeg")|| ($_FILES["image"]["type"] == "image/jpg"))
            {
			
				$srcimg=imagecreatefromjpeg($prod_img) or die('Problem In opening Source Image');
				imagecopyresampled($destimg, $srcimg, 0, 0, 0, 0, $new_width, $new_height, $sizes[0], $sizes[1]) or die('Problem In resampling');
				imagejpeg($destimg,$prod_img_thumb,100) or die('Problem In saving');
				imagedestroy($destimg);
            }
             elseif(($_FILES["image"]["type"] == "image/png")|| ($_FILES["image"]["type"] == "image/x-png")) 
             {
				$srcimg=imagecreatefrompng($prod_img) or die('Problem In opening Source Image');
				imagecopyresampled($destimg, $srcimg, 0, 0, 0, 0, $new_width, $new_height, $sizes[0], $sizes[1]) or die('Problem In resampling');
				imagepng($destimg,$prod_img_thumb,9) or die('Problem In saving');
				imagedestroy($destimg);
             }
	
	

	 $sql = "INSERT INTO answer(a_answer,a_img,a_img_big,a_name,a_tel,a_email,a_date,a_ip,a_hidden)  
			    VALUES('$answerW1', '$prefix$userfile_name','$userfile_name','$nameW2', '$tel','$emailW4','$a_date','$ip','$emailK')";
	
	mysql_query("SET NAMES UTF8"); 
	mysql_db_query($dbname, $sql);
	

	 
}
	 }
	 }else{

	 $sql = "INSERT INTO answer(a_answer,a_name,a_email,a_date,a_ip,a_hidden)
  				
			    VALUES('$answerW1', '$nameW2', '$emailW4','$a_date','$ip','$emailK') ";
		
	 mysql_query("SET NAMES UTF8"); 
	 mysql_db_query($dbname, $sql);
	
	
}
	?>
	
	
		<script language="JavaScript">
      alert("กระทู้ของท่านได้เพิ่มเรียบร้อยแล้ว \nคลิก OK  เพื่อกลับไปหน้าแรก");
	  window.location.href='../index.php?page=webboard';
	</script>
	<?
	} else {
?>
<script language="JavaScript">
		alert("คุณกรอกรหัสความปลอดภัยไม่ถูกต้อง กรุณากรอกใหม่");
		window.history.go(-1);
	</script>
	<?
}
?>