oEmbed Gist into WordPress

gist-oembed-wordpress

wp_embed_register_handler(
    'github-gist',
    '/https:\/\/gist\.github\.com\/([^\/]+)\/([^\/]+)/',
    function($matches, $attr, $url, $rawattr) {
        $embed = "<script src=\"{$url}.js\"></script>";

        return apply_filters(
            'embed_github_gist',
            $embed,
            $matches,
            $attr,
            $url,
            $rawattr
        );
});