To hide project until is released

cover.php

<?php
/*
.htaccess

RewriteEngine on

RewriteCond %{HTTP_COOKIE} !.*cover=1.*
RewriteCond %{REQUEST_URI} !^/cover.php
RewriteRule .* cover.php [R=302,L]

*/
header("X-Robots-Tag: noindex,nofollow");
if ($_COOKIE['cover'] == 1) {
        header("Location: /");
        exit;
}

session_start();
if ($_POST[$_SESSION['name']] === 'yetAn0ther!23'){
        setcookie("cover", 1);
        header("Location: /");
        exit;
}
if (!$_SESSION['name']) {
        $_SESSION['name'] = 'coverkey'.rand(5555, 8888);
}
?>
<form method="post" >
        <input type=password name=<?php echo $_SESSION['name']; ?> >
</form>