27.cookies.php

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>Cookies</title>
        <link href="css/bootstrap.min.css" rel="stylesheet">
        <style>
            h1{
                color:purple;   
            }
            h3{
                color:#42d5ce;   
            }
            .containingDiv{
                border:1px solid #7c73f6;
                margin-top: 100px;
                border-radius: 15px;
            }
        </style> 

    </head>
        <body>
<?php
include "header.php";
?>
<div class="container-fluid">
    <div class="row">
        <div class="col-sm-offset-1 col-sm-10 containingDiv">
            <h1>Cookies:</h1>
<?php
setcookie("username", "buenosdias", time()+7*24*60*60);
setcookie("username", "", time()-1000);
print_r($_COOKIE);
if($_COOKIE["username"]){
    echo "<p>Value of the username cookie: ".  $_COOKIE["username"] ."</p>";   
}else{
    echo "<p>Cookie not set.</p>";   
}
?>
        </div>
    </div>
</div>
<?php
include "footer.php";
?>
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
        <script src="js/bootstrap.min.js"></script>
        </body>
</html>