<?php
include("conn.php");
$id = $_GET;
$id = intval($id);
mysql_select_db("test", $con);
$sql="mysql_query("UPDATE example SET subject='$_POST',content='$_POST' WHERE id='$id'");
  if (!mysql_query($sql,$con))
  {
  die('Error: ' . mysql_error());
  }
echo "1 record added";
mysql_close($con);
?>

<?php
 include("conn.php");
 $id = $_GET["id"];
 $id = intval($id);
 mysql_select_db("test", $con);
 $sql=mysql_query("UPDATE example SET subject='" . $_POST["subject"] . "',content='" . $_POST["content"] . "' WHERE id=" . $id) or die('Error: ' . mysql_error());
 if ($subject)
      echo "1 record added";
 mysql_close($con);
?>

<?php
include("conn.php");
$id = $_GET{"id"};
$id = intval($id);
$postsbj = $_POST{"subject"};
$postcon = $_POST{"elm1"};
echo "DEBUG: $postsbj<br/>";
echo "DEBUG: $postcon";
mysql_select_db("test", $con);
 $sql=mysql_query("UPDATE example SET subject=" . $postsbj . ",content=" . $postcon . " WHERE id=" . $id)
or die('Error: ' . mysql_error());
echo "1 record updated";
mysql_close($con);
?>

$query = mysql_query("UPDATE example SET name='{$_POST['name']}' WHERE id='{$_POST['id']}'");