สอบถามเรื่องกำหนด Session ตามเงื่อนไขหน่อยค่ะ ว่าทำอย่างไร

<?php
$cookie_name = "user";
$cookie_value = "John Doe";
setcookie($cookie_name, $cookie_value, time() + (86400 * 1), "/"); // 86400 = 1 day

if(!isset($_COOKIE[$cookie_name])) {
    header("Location: Page1.php");
} else {
    header("Location: Page2.php");
}
?>

<?php

$ses = 'MYSES';

  //$lifetime = 60*60*24*1; // 1 days
  $lifetime=86400; // 86400 second = 1 day
  session_set_cookie_params($lifetime);
  session_start();

    if (isset($_COOKIE[$ses])){
      setcookie($ses, $_COOKIE[$ses], time() + $lifetime, "/");
      header("Location: Page1.php");
} else {
    header("Location: Page2.php");
}

?>