การแก้ไข file ภาพ ที่เก็บไว้ในfolder อะค่ะช่วยดูให้หน่อยค่ะ ติดมานานแล้วค่ะ

<?
include("connect.php");
$sql = "select * from category";
$result = mysql_db_query($dbname,$sql);
while($rc = mysql_fetch_array($result)){
echo "<option value='$rc[category_id]'>$rc[category_name]</option>";
}
?></select></td>
      </tr>
      <tr>
        <td align="left"><span class="style1">ชื่ออะไหล่</span></td>
        <td align="left"><input name="spare_name" type="text" class="textfield_n"  value="<?=$up['spare_name']?>" /></td>
      </tr>
      <tr>
        <td align="left"><span class="style1">จำนวน</span></td>
        <td align="left"><input name="number" type="text" class="textfield" value="<?=$up['number']?>"/></td>
      </tr>
      <tr>
        <td align="left"><span class="style1">หน่วยนับ</span></td>
        <td align="left"><input name="unit" type="text" class="textfield"  value="<?=$up['unit']?>" /></td>
      </tr>
      <tr>
        <td align="left"><span class="style1">จุดสั่งซื้อ</span></td>
        <td align="left"><input name="limitt" type="text" class="textfield" value="<?=$up['limitt']?>"/></td>
      </tr>
      <tr>
        <td align="left"><span class="style1">ระยะเวลาจัดซื้อ</span></td>
        <td align="left"><input name="retime" type="text" class="textfield"   value="<?=$up['retime']?>"/></td>
      </tr>
      <tr>
        <td align="left">สถานที่จัดเก็บ</td>
        <td align="left"><label>
          <input name="s_at" type="text" class="textfield_n" id="s_at"  value="<?=$up['s_at']?>"/>
        </label></td>
      </tr>
      <tr>
                <td height="32" align="left" ><span class="style1">เลือกไฟล์ภาพ</span></td>  
                <td colspan="4" align="left" valign="middle" ><img src='../spareparts_system/uploadfiles/<?=$up['pic']?>'  width='206' height='180' /></td> 
          </tr> 
      <tr>
        <td align="left">&nbsp;</td>
        <td align="left"><input name="pic" type="file" class="textfield_n" size="40"  />
          <input type="hidden" name="hdnOldFile" value="../spareparts_system/uploadfiles/<?=$up['pic']?>" /></td>
      </tr>
      <tr>
        <td align="right">&nbsp;</td>
        <td align="left"><input type="submit" name="submit_e" id="button" value="Submit" /></td>
      </tr>
    </table>
   
    <? }?>
      </form>
       <?
       include('connect.php');	
if($_POST['submit_e']){
		if('$pic' != "")
		{
		@unlink("../spareparts_system/uploadfiles".$_POST["hdnOldFile"]);
			echo "$pic";
		}//'$pic' != " "

$sql = "UPDATE spareparts SET  spare_name = '$spare_name',category_id='$category_id',number = '$number',unit = '$unit',limitt = '$limitt',retime='$retime',s_at='$s_at' WHERE spare_id='$spare_id'";		
echo $sql ;
/*$db=mysql_query($sql);	      
	//if($db){
					echo"<script>alert('แก้ไขข้อมูลเรียบร้อย');window.location='spareparts.php';</script>"; exit();
				}else{
		echo "55555";
				}    */
		}//$_POST['submit_e']
	
				  
 ?>