Example:

<?php

  setcookie(name, value, expire, 

path,domain, secure, httponly);

$cookie_uame="codingslover";

$cookie_uvalue="website";

//set cookies for 1 hour time
  setcookie($cookie_uname,

$cookie_uvalue, 3600, "/");

//expire cookies
setcookie($cookie_uname,"",-3600);

?>

Example:

<?php

session_start();

//session variable
$_SESSION['testvaraible'] ='Codings';
 

//destroyed the entire sessions
session_destroy();          //Destroyed the session 

variable "testvaraible".
unset($_SESSION['testvaraible']);
?>