cdn.php

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">

<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<!-- Popper JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>

<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>

<!-- Custom fonts -->
<link href="https://fonts.googleapis.com/css?family=Montserrat:400,700" rel="stylesheet" type="text/css">
<link href='https://fonts.googleapis.com/css?family=Kaushan+Script' rel='stylesheet' type='text/css'>
<link href='https://fonts.googleapis.com/css?family=Droid+Serif:400,700,400italic,700italic' rel='stylesheet' type='text/css'>
<link href='https://fonts.googleapis.com/css?family=Roboto+Slab:400,100,300,700' rel='stylesheet' type='text/css'>

<!-- Font Awesome -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

<!-- Sweet Alert -->
<script src="https://cdn.jsdelivr.net/npm/sweetalert2@7.26.10/dist/sweetalert2.all.min.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/sweetalert2@7.26.10/dist/sweetalert2.min.css">
<script src="assets/js/popup.js"></script>
<script src="assets/js/reset_form.js"></script>

<!-- Datatables -->
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.16/css/dataTables.bootstrap4.min.css">
<script src="https://cdn.datatables.net/1.10.16/js/jquery.dataTables.min.js" charset="utf-8"></script>
<script src="https://cdn.datatables.net/1.10.16/js/dataTables.bootstrap4.min.js" charset="utf-8"></script>