// Plugin Name: Regio Style Slider
// Description: Slider met stijl en plaatsing zoals regio15.nl, direct onder menu.
// Version: 1.2
// Author: 112 Amersfoort Nu

if (!defined('ABSPATH')) exit;

add_action('wp_enqueue_scripts', function () {
    wp_enqueue_style('regio-slider-style', plugin_dir_url(__FILE__) . 'style.css');
    wp_enqueue_script('regio-slider-script', plugin_dir_url(__FILE__) . 'slider.js', array('jquery'), null, true);
});

function regio_slider_html() {
    if (!get_theme_mod('regio_slider_enable', true)) return;

    echo '<div class="regio-slider">';
    echo '<div class="regio-slide"><h1>Brandweer, politie en ambulance meldingen</h1></div>';
    echo '</div>';
}

add_action('wp_body_open', 'regio_slider_html');

// Customizer-instelling
add_action('customize_register', function ($wp_customize) {
    $wp_customize->add_section('regio_slider_section', array(
        'title'    => __('Regio Slider', 'regio-style-slider'),
        'priority' => 30,
    ));

    $wp_customize->add_setting('regio_slider_enable', array(
        'default'   => true,
        'transport' => 'refresh',
    ));

    $wp_customize->add_control('regio_slider_enable', array(
        'label'   => __('Toon slider', 'regio-style-slider'),
        'section' => 'regio_slider_section',
        'type'    => 'checkbox',
    ));
});
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://www.112amersfoortnu.nl/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://www.112amersfoortnu.nl/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://www.112amersfoortnu.nl/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://www.112amersfoortnu.nl/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://www.112amersfoortnu.nl/wp-sitemap-taxonomies-post_tag-1.xml</loc></sitemap><sitemap><loc>https://www.112amersfoortnu.nl/wp-sitemap-taxonomies-post_format-1.xml</loc></sitemap><sitemap><loc>https://www.112amersfoortnu.nl/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>