<?php
$conn= mysql_connect("localhost", "root", "");
  if(!$conn){
      exit("Error in SQL");
    }
  mysql_select_db("college", $conn);
  $val1=$_REQUEST['login1'];
  $val2=$_REQUEST['password1'];
 
  $sql = "SELECT * FROM tlogin WHERE tid='$val1' AND tpasswd='$val2'";
  $rt = mysql_query($sql, $conn);
  $num = mysql_num_rows($rt);
 
  if($num==0){
    print("<script language='javascript'>");
  print("window.location='index.html';");
  print("alert(\"Incorrect username or password...\")");
  print("</script>"); 
  } 
  else
  {
 
  mysql_select_db("college", $conn);
  $row= mysql_fetch_array($rt);
  $tname=$row['$tname'];
  $_POST['$tname'];
  URL=http://172.31.81.150/teacher.php?exvar='$tname';
  //$sql = "SELECT sname FROM register WHERE regno=$val1";
  //$rt=mysql_query($sql,$conn);
  //$a_row = mysql_fetch_array( $rt );
  //$sname=stripslashes($a_row['sname']);
  //echo urlencode($_GET['sname']);
 
  //session_register("username");
 
//username = "$sname";
 //$_SESSION[$sname]="$sname";
  setcookie("auth", "1", 0, "/", "", 0);
  //print("<script language='javascript'>"); 
 
  //print("window.location='teacher.php';"); 
  //print("</script>");
 }
?>

<a href="temp.php?var=hello">test</a>

<?
echo $_GET['var'];
?>

<? session_start(); ?> 

$_SESSION['sname'] = $sname;

echo $_SESSION['sname'];