如何设置Cookie以及该Cookie是否已存在或不执行任何操作

Question

How to do something like this with cookies?

If a cookie exists, redirect user to a last used URL on a site or a homepage.

If not , create a cookie + redirect to specific page with registration form.

Can you check if this php -code is doing this as defined above?

<?php
if(!isset($_COOKIE['firsttime'])) {
?>
<meta http-equiv="refresh" content="0; url=http://example.com/">
<?php
} else {
setcookie('firsttime',time() + (86400 * 7));
?>
<meta http-equiv="refresh" content="0; url=http://example.com/"> // redirecrting to registratio form
<?php
}
?>

Answer 1

You should consider to use a php request rather than an meta tag because its more seamless for the end use. Check out this Thread: https://stackoverflow.com/a/768472/4043299

If you want more then user redircetion eg store login of user you should use PHP Sessions . With PHP Sessions you can safely storage data which is assigned to the users active ssesion.