Základní části Wordpress šablony:

header.php

<!doctype html>
<html lang="cs">
<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><?php wp_title('|', true, 'right'); ?></title>

    <link rel="stylesheet" href="<?php bloginfo('template_url'); ?>/build/css/vendor.css" />
    <link rel="stylesheet" href="<?php bloginfo('template_url'); ?>/build/css/app.css" />

    <?php wp_head(); ?>
</head>
<body>

index.php

<?php get_header(); ?>

    // Index content

<?php get_footer(); ?>

footer.php

    <script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
    <script src="<?php bloginfo('template_url'); ?>/build/js/vendor.js"></script>
    <script src="<?php bloginfo('template_url'); ?>/build/js/app.js"></script>

    <?php wp_footer(); ?>

</body>
</html>