Session

//Login.php
<?php
session_start();
   
   
    if(isset($_POST['s1']))
    {
    $x=$_POST['t1'];
    $_SESSION['user']=$x;
    $y=$_POST['t2'];
   

if(isset($_SESSION['user']))
            {
                header("Location:session1.php");   
            }   
    else
        {
            echo "Sorry........";
        }
    }

?>
<form id="form1" name="form1" method="post" action="">
  <table width="300" border="1">
    <tr>
      <td width="88">User</td>
      <td width="196"><input name="t1" type="text" id="t1" /></td>
    </tr>
    <tr>
      <td>Password</td>
      <td><input name="t2" type="text" id="t2" /></td>
    </tr>
    <tr>
      <td colspan="2"><div align="center">
        <input name="s1" type="submit" id="s1" value="Submit" />
      </div>  <div align="center"></div></td>
    </tr>
  </table>
</form>

//Session.php


<?php
session_start();
if(isset($_SESSION['user']))
{
    echo "Hi " .$_SESSION['user'];
}
?>