login.htm
	user id : tommee
	password: ******

login-submit.php
	$_SESSION['pet'] = 'dinosaur';
	setcookie("user", "Tommee", time()+60, "/");
	setcookie("visit", date("Y-m-d"), time()+3600, "/");

	favorite: basketball (for 1 day) ?

search-student.php
insert-student.php
delete-student.php
update-student.php
report.php

<?php
session_start();
if(isset($_SESSION['pet'])){
    echo 'Welcome to my web site<p>';
}else{
    echo '<h2>Error!</h2>Please LOGIN first!<p>';
    header ('refresh:2; url=login.htm');    exit();
}


if(isset($_COOKIE["user"])){
    ...

}else{
    echo "Cookies not found.";
    ...
}
?>


<?php
if(isset($_COOKIE["user"]) and isset($_COOKIE["visit"])) {
    echo "Deleting Cookies ...";

    setcookie("user", "", time()-60 );
    setcookie("visit", "", time()-60 );

}else{
    echo "Cookies not found.";
}
?>