สอบถามเกี่ยวกับการเรียกแสดงข้อมูล ว่าใครเป็นผู้โพสหรือบันทึุกข้อมูล

<?
$ch=$_GET["check"];

$l1 = $_POST["textfield1"];
$l2 = $_POST["textfield2"];
$l3 = $_POST["textfield3"];
$l4 = $_POST["txtss44"];



if($ch == "true" && $l1 != "" && $l2 != "" && $l3 != "" && $l4 != "" ){

mysql_connect("localhost","root","root");
mysql_select_db("test1");
mysql_query("SET NAMES UTF8");

$strSQL = "INSERT INTO product (List2,List3,List4,status) VALUES ('$l1','$l2','$l3','$l4')";

$objQuery = mysql_query($strSQL);

if($objQuery){
echo "<h3 align='center'>บันทึกเรียบร้อย</h3><br>";
echo "<meta http-equiv='refresh' content='1;URL=add1.php'>";
}else{
echo "Error";
}

}

?>




<form ACTION="add1.php?check=true" METHOD="post" NAME="form1">
<input name="txtss44" type="hidden" value="ยังไม่ขาย
  " />
  
<table ALIGN="center" WIDTH="100%" BORDER="0" bordercolor="#FBBBBD" CELLSPACING="10" CELLPADDING="5">



<tr>
<td>
<th ALIGN="center" SCOPE="col"> 
<input type="image"  src="images/444.png" name="submit" value="update" >
</th>

</tr>

<tr>
  <td ALIGN="center" bgcolor="#FBBBBD"><font size="+1" > Item</td>
  <td><label FOR="textfield1"></label>
    <input name="textfield1" type="text" required id="textfield1" value="" size="64"></td>
</tr>


<tr>
<td ALIGN="center" bgcolor="#FBBBBD"><font size="+1" > Qty.</td>
<td><label FOR="textfield2"></label>
  <input name="textfield2" type="text" required id="textfield2" value="" size="10" maxlength="10"></td>
</tr>







<tr>
<td ALIGN="center" bgcolor="#FBBBBD"><font size="+1" >อื่นๆ</td>
<td><label FOR="textfield3"></label>
  <textarea name="textfield3" cols="64" required="required" id="textfield3"></textarea></td>
</tr>

</table>
</form>