<?php function set_my_cookie($var, $value = '', $time = 0, $path = '', $domain = '') { $_COOKIE[$var] = $value; setcookie($var, $value, $time, $path, $domain); } // set_my_cookie('test', 'ryan_test'); // echo $_COOKIE['test']; if ($_SERVER['REQUEST_METHOD'] == 'POST') { set_my_cookie('test1', 'ryan_test1'); } echo $_COOKIE['test1']; ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Cookie</title> </head> <body> <form action="" method='post'> <input type="submit" /> </form> </body> </html>