font.php

<?php
if (!empty($gfonts)) {
    $font_array = explode('|', $gfonts);

    foreach ($font_array as $font) {
        if (empty($font)) {
            continue;
        }

        $query_args = ['family' => $font];
        $font_handle = 'gutsliders-font-' . sanitize_title($font);

        wp_register_style(
            $font_handle,
            add_query_arg($query_args, '//fonts.googleapis.com/css'),
            [],
            GUTSLIDER_VERSION,
            'all'
        );

        wp_enqueue_style($font_handle);
    }
}