Code Library

/* --- Fluid Typography --- */

/* H1 Hoofdtitel */
/* Minimaal 32px (mobiel), groeit mee, maximaal 56px (grote schermen) */
h1, .elementor-heading-title.elementor-size-default {
    font-size: clamp(2rem, 5vw, 3.5rem) !important;
}

/* H2 Sectie titels */
/* Minimaal 26px, groeit mee, maximaal 40px */
h2, .elementor-widget-heading h2.elementor-heading-title {
    font-size: clamp(1.625rem, 4vw, 2.5rem) !important;
}

/* H3 Subkopjes */
/* Minimaal 22px, groeit mee, maximaal 28px */
h3, .elementor-widget-heading h3.elementor-heading-title {
    font-size: clamp(1.375rem, 2.5vw, 1.75rem) !important;
}

/* Body / Paragraaf tekst */
/* De !important zorgt dat dit wint van de widget-instellingen */
p, body, .elementor-widget-text-editor {
    font-size: clamp(1rem, 0.5vw + 0.8rem, 1.125rem) !important;
}

/* Uitzondering voor kleine lettertjes (zoals copyright/footer) */
/* Geef deze widgets of secties de CSS-klasse: 'kleine-tekst' */
.kleine-tekst p, .kleine-tekst, small {
    font-size: 0.875rem !important; /* 14px */
}

/************************************************************
* @description    WordPress | Remove jQuery migrate
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function smartwp_remove_jquery_migrate( $scripts ) {
  if ( !is_admin() && !empty( $scripts->registered['jquery'] ) ) {
    $scripts->registered['jquery']->deps = array_diff( $scripts->registered['jquery']->deps, ['jquery-migrate'] );
  }
}
add_action('wp_default_scripts', 'smartwp_remove_jquery_migrate');

/************************************************************
* @description    WordPress | Custom logo top left in WP Admin
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function smartwp_custom_logo_wp_dashboard() {
  echo "<style type='text/css'>
    #wpadminbar #wp-admin-bar-wp-logo > .ab-item .ab-icon:before {
      background-image: url('" . get_bloginfo('stylesheet_directory') . "/admin-icon.png');
      background-size: contain;
      background-position: 0 0;
      color:rgba(0, 0, 0, 0);
    }
    #wpadminbar #wp-admin-bar-wp-logo > .ab-item .ab-icon {
      background-position: 0 0;
    }";
}

/************************************************************
* @description    WordPress | Create user
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function smartwp_create_admin_user(){
  $username = 'Systemedic';
  $password = 'CHANGE_THIS_PASSWORD'; // Changed for security
  $email = 'E-MAIL HERE';
  
  //This will ensure it only tries to create the user once (based on email/username)
  if ( !username_exists( $username ) && !email_exists( $email ) ) {
    $userid = wp_create_user( $username, $password, $email );
    $user = new WP_User( $userid );
    $user->set_role( 'administrator' );
  }
}
add_action('init', 'smartwp_create_admin_user');

/************************************************************
* @description    Change wp-admin footer
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function remove_footer_admin () {
    echo 'Development by <a href="https://systemedic.nl" target="_blank">Systemedic</a> | Questions & Support: <a href="https://mijn.systemedic.nl" target="_blank">Systemedic Support</a></p>';
}
 
add_filter('admin_footer_text', 'remove_footer_admin');

/************************************************************
* @description    WordPress | Systemedic Dashboard Widget
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
// Add a custom dashboard widget
function my_custom_dashboard_widget() {
    wp_add_dashboard_widget(
        'custom_dashboard_widget', // Widget ID
        'Systemedic Support', // Widget Title
        'custom_dashboard_widget_display' // Callback function
    );
}
add_action('wp_dashboard_setup', 'my_custom_dashboard_widget');

// The content of the widget
function custom_dashboard_widget_display() {
    ?>
    <style>
        .custom-dashboard-widget ul {
            list-style-type: disc;
            padding-left: 20px;
        }
        .custom-dashboard-widget img {
            max-width: 100%;
            height: auto;
        }
    </style>
    <div class="custom-dashboard-widget">
         <img src="https://mijn.systemedic.nl/templates/lagom2/assets/img/logo/logo_big.1582291681.png" alt="Systemedic Logo">
        <ul>
            <li>Do you have questions, problems, or ideas? Contact Systemedic: 
                <a href="https://mijn.systemedic.nl/submitticket.php?step=2&deptid=2" target="_blank">Contact Us</a>
            </li>
            <li>Have a question? Check the knowledge base first, you can view it here: 
                <a href="https://mijn.systemedic.nl/knowledgebase/29/WordPress" target="_blank">Knowledge Base</a>
            </li>
            <li>Want to keep your website in top condition? Discover our maintenance packages for a worry-free website.
                <a href="https://mijn.systemedic.nl/store/onderhoudspakketten" target="_blank">Maintenance Packages</a>
            </li>
        </ul>
    </div>
    <?php
}

/************************************************************
* @description    Disable Gutenberg block editor
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
// Disable Gutenberg on the back end.
add_filter( 'use_block_editor_for_post', '__return_false' );

// Disable Gutenberg for widgets.
add_filter( 'use_widgets_block_editor', '__return_false' );

add_action( 'wp_enqueue_scripts', function() {
    // Remove CSS on the front end.
    wp_dequeue_style( 'wp-block-library' );

    // Remove Gutenberg theme.
    wp_dequeue_style( 'wp-block-library-theme' );

    // Remove inline global CSS on the front end.
    wp_dequeue_style( 'global-styles' );

    // Remove classic-themes CSS for backwards compatibility for button blocks.
    wp_dequeue_style( 'classic-theme-styles' );
}, 20 );

/************************************************************
* @description    Hide Woocommerce Payments menu item
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function remove_payments_ad_tab(): void {
  remove_menu_page("admin.php?page=wc-admin&task=woocommerce-payments");
}
add_action("admin_menu", "remove_payments_ad_tab", 999);

/************************************************************
* @description    Display user role in HTML code
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function display_user_role_in_html_comment() {
    if (is_user_logged_in()) {
        $current_user = wp_get_current_user();
        if (!empty($current_user->roles)) {
            echo "\n\n";
        }
    } else {
        echo "\n\n";
    }
}
add_action('wp_head', 'display_user_role_in_html_comment');

User-agent: *
Crawl-delay:10
Disallow: /wp-admin/ #no access to admin sections.
Disallow: /wp-login.php #no access to admin sections.
Disallow: /search/ #no access to internal search results.
Disallow: *?s=* #no access to internal search results.
Disallow: *?p=* #no access to pages if permalinks don't work.
Disallow: *&p=* #no access to pages if permalinks don't work.
Disallow: *&preview=* #no access to preview pages.
Disallow: /tag/ #no access to tag archive pages.
Disallow: /author/ #no access to author archive pages.
Disallow: /404-error/ #no access to 404 page.
Disallow: /*?orderby=
Disallow: /*?add-to-cart=
Disallow: /wp-content/plugins/
Disallow: /uploads/
Disallow: *category=*
Disallow: *categoria*
Disallow: *categorie*
Disallow: *filter* # Block bad bots
User-agent: Dotbot
Disallow: /

User-agent: Baiduspider
Disallow: /

User-agent: YandexBot
Disallow: /

User-agent: Sogou Spider
Disallow: /

User-agent: SeznamBot
Disallow: /

User-agent: Scrapy
Disallow: /

Sitemap: https://URL/sitemap_index.xml

/************************************************************
* @description    Add custom product tabs
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
// Add the 'Custom Tabs' tab under 'Product Data'
add_filter('woocommerce_product_data_tabs', 'add_custom_tabs_main', 10, 1);
function add_custom_tabs_main($tabs) {
    // Add the main 'Custom Tabs' tab
    $tabs['custom_tabs'] = array(
        'label'    => __('Custom Tabs', 'woocommerce'),
        'target'   => 'custom_tabs_content',
        'priority' => 60, // Place the tab after standard tabs
    );
    return $tabs;
}

// Add content for the 'Custom Tabs' panel with Ingredients and Instructions
add_action('woocommerce_product_data_panels', 'custom_tabs_content');
function custom_tabs_content() {
    global $post;

    // Get the saved content of the fields
    $ingredients = get_post_meta($post->ID, '_custom_ingredients', true);
    $instructions = get_post_meta($post->ID, '_custom_instructions', true);
    $ingredients_title = get_post_meta($post->ID, '_custom_ingredients_title', true); // Title Ingredients
    $instructions_title = get_post_meta($post->ID, '_custom_instructions_title', true); // Title Instructions

    // Tab content for Ingredients
    echo '<div id="custom_tabs_content" class="panel woocommerce_options_panel">';
    
    // Ingredients Title and WYSIWYG editor
    echo '<div class="options_group">';
    echo '<p class="form-field">';
    echo '<label for="_custom_ingredients_title">' . __('Alternative tab name', 'woocommerce') . '</label>';
    echo '<input type="text" id="_custom_ingredients_title" name="_custom_ingredients_title" value="' . esc_attr($ingredients_title) . '" />';
    echo '</p>';

    // Ingredients field with WYSIWYG editor
    echo '<p class="form-field">';
    echo '<label for="_custom_ingredients">' . __('Ingredients', 'woocommerce') . '</label>';
    wp_editor($ingredients, '_custom_ingredients', array(
        'textarea_name' => '_custom_ingredients',
        'media_buttons' => true,
        'textarea_rows' => 10,
        'teeny' => true, // Minimal editor without many buttons
    ));
    echo '</p>';

    // Instructions Title and WYSIWYG editor
    echo '<p class="form-field">';
    echo '<label for="_custom_instructions_title">' . __('Alternative tab name', 'woocommerce') . '</label>';
    echo '<input type="text" id="_custom_instructions_title" name="_custom_instructions_title" value="' . esc_attr($instructions_title) . '" />';
    echo '</p>';

    // Instructions field with WYSIWYG editor
    echo '<p class="form-field">';
    echo '<label for="_custom_instructions">' . __('Instructions', 'woocommerce') . '</label>';
    wp_editor($instructions, '_custom_instructions', array(
        'textarea_name' => '_custom_instructions',
        'media_buttons' => true,
        'textarea_rows' => 10,
        'teeny' => true, // Minimal editor without many buttons
    ));
    echo '</p>';
    echo '</div>';
    echo '</div>';
}

// Save the field data, including the tab titles
add_action('woocommerce_process_product_meta', 'save_custom_tabs_product_data');
function save_custom_tabs_product_data($post_id) {
    // Save data for Ingredients, Instructions, and their titles
    if (isset($_POST['_custom_ingredients'])) {
        update_post_meta($post_id, '_custom_ingredients', wp_kses_post($_POST['_custom_ingredients']));
    }

    if (isset($_POST['_custom_instructions'])) {
        update_post_meta($post_id, '_custom_instructions', wp_kses_post($_POST['_custom_instructions']));
    }

    if (isset($_POST['_custom_ingredients_title'])) {
        update_post_meta($post_id, '_custom_ingredients_title', sanitize_text_field($_POST['_custom_ingredients_title']));
    }

    if (isset($_POST['_custom_instructions_title'])) {
        update_post_meta($post_id, '_custom_instructions_title', sanitize_text_field($_POST['_custom_instructions_title']));
    }
}

// Add tabs for Ingredients and Instructions on the product page, but only if they have content
add_filter('woocommerce_product_tabs', 'add_custom_product_tabs', 10, 1);
function add_custom_product_tabs($tabs) {
    global $post;

    // Get saved content for ingredients, instructions, and their titles
    $ingredients = get_post_meta($post->ID, '_custom_ingredients', true);
    $instructions = get_post_meta($post->ID, '_custom_instructions', true);
    $ingredients_title = get_post_meta($post->ID, '_custom_ingredients_title', true);
    $instructions_title = get_post_meta($post->ID, '_custom_instructions_title', true);

    // Add Ingredients tab if there is content
    if (!empty($ingredients)) {
        $tabs['ingredients_tab'] = array(
            'title'    => !empty($ingredients_title) ? $ingredients_title : __('Ingredients', 'woocommerce'),
            'priority' => 50,
            'callback' => 'ingredients_tab_content',
        );
    }

    // Add Instructions tab if there is content
    if (!empty($instructions)) {
        $tabs['instructions_tab'] = array(
            'title'    => !empty($instructions_title) ? $instructions_title : __('Instructions', 'woocommerce'),
            'priority' => 51,
            'callback' => 'instructions_tab_content',
        );
    }

    return $tabs;
}

// Function to display the content of the Ingredients tab
function ingredients_tab_content() {
    global $post;
    $ingredients = get_post_meta($post->ID, '_custom_ingredients', true);
    echo wpautop($ingredients);
}

// Function to display the content of the Instructions tab
function instructions_tab_content() {
    global $post;
    $instructions = get_post_meta($post->ID, '_custom_instructions', true);
    echo wpautop($instructions);
}

/************************************************************
* @description    Auto set paid WooCommerce orders to completed
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
 add_filter( 'woocommerce_payment_complete_order_status', 'bbloomer_autocomplete_processing_orders', 9999 );
 
function bbloomer_autocomplete_processing_orders() {
   return 'completed';
}

/************************************************************
* @description    E-mail before download
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
// Create table for storing PDF download submissions
function create_pdf_download_table() {
    global $wpdb;
    $table_name = $wpdb->prefix . 'pdf_downloads';
    
    $charset_collate = $wpdb->get_charset_collate();
    $sql = "CREATE TABLE IF NOT EXISTS $table_name (
        id mediumint(9) NOT NULL AUTO_INCREMENT,
        naam tinytext NOT NULL,
        email varchar(100) NOT NULL,
        tijd datetime DEFAULT CURRENT_TIMESTAMP NOT NULL,
        pdf_url text NOT NULL,
        PRIMARY KEY (id)
    ) $charset_collate;";
    
    require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
    dbDelta($sql);
}

// Direct call to create the table if it doesn't exist
create_pdf_download_table();

// Shortcode function for the PDF download form
function pdf_download_form_shortcode($atts) {
    $atts = shortcode_atts(
        array(
            'pdf_url' => '', // Default no PDF URL
        ),
        $atts,
        'pdf_download_form'
    );

    if (empty($atts['pdf_url'])) {
        return '<p>No PDF available for download.</p>';
    }

    if (isset($_POST['submit_form'])) {
        if (!empty($_POST['naam']) && !empty($_POST['email'])) {
            $naam = sanitize_text_field($_POST['naam']);
            $email = sanitize_email($_POST['email']);
            
            global $wpdb;
            $table_name = $wpdb->prefix . 'pdf_downloads';
            $wpdb->insert(
                $table_name,
                array(
                    'naam' => $naam,
                    'email' => $email,
                    'pdf_url' => $atts['pdf_url'],
                )
            );

            $download_link = '<p>Thank you, ' . esc_html($naam) . '! Click here to download the PDF: <a href="' . esc_url($atts['pdf_url']) . '" target="_blank">Download PDF</a></p>';
            
            return $download_link;
        } else {
            return '<p>Please fill in all fields.</p>';
        }
    }

    ob_start(); ?>
    <form method="post">
        <label for="naam">Name:</label><br>
        <input type="text" id="naam" name="naam" style="width: 50%;" required><br><br>
        
        <label for="email">E-mail:</label><br>
        <input type="email" id="email" name="email" style="width: 50%;" required><br><br>
        
        <input type="submit" name="submit_form" value="Download PDF" style="width: 50%;">
    </form>
    <?php
    return ob_get_clean();
}
add_shortcode('pdf_download_form', 'pdf_download_form_shortcode');

// Add admin menu for displaying submissions
function pdf_download_admin_menu() {
    add_menu_page(
        'PDF Downloads',
        'PDF Downloads',
        'manage_options',
        'pdf-downloads',
        'display_pdf_downloads_page',
        'dashicons-media-document',
        20
    );
}
add_action('admin_menu', 'pdf_download_admin_menu');

// Function to display and delete submissions in admin
function display_pdf_downloads_page() {
    global $wpdb;
    $table_name = $wpdb->prefix . 'pdf_downloads';

    // Delete a record if 'delete_id' parameter is set
    if (isset($_GET['delete_id'])) {
        $delete_id = intval($_GET['delete_id']);
        $wpdb->delete($table_name, array('id' => $delete_id));
        echo '<div class="notice notice-success is-dismissible"><p>Submission successfully deleted.</p></div>';
    }

    // Retrieve data to display
    $downloads = $wpdb->get_results("SELECT * FROM $table_name");

    echo '<div class="wrap"><h1>PDF Download Submissions</h1>';
    echo '<table class="widefat fixed" cellspacing="0"><thead><tr><th>Name</th><th>Email</th><th>PDF URL</th><th>Time</th><th>Action</th></tr></thead><tbody>';

    if (!empty($downloads)) {
        foreach ($downloads as $download) {
            echo '<tr>';
            echo '<td>' . esc_html($download->naam) . '</td>';
            echo '<td>' . esc_html($download->email) . '</td>';
            echo '<td><a href="' . esc_url($download->pdf_url) . '" target="_blank">' . esc_html($download->pdf_url) . '</a></td>';
            echo '<td>' . esc_html($download->tijd) . '</td>';
            echo '<td><a href="' . esc_url(add_query_arg('delete_id', $download->id)) . '" onclick="return confirm(\'Are you sure you want to delete this submission?\');" class="button button-danger">Delete</a></td>';
            echo '</tr>';
        }
    } else {
        echo '<tr><td colspan="5">No submissions found.</td></tr>';
    }

    echo '</tbody></table></div>';
}

/************************************************************
* @description    WordPress | Enforce Strong Passwords
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function force_strong_passwords($errors, $update, $user) {
    if (empty($user->user_pass)) {
        return;
    }

    if (strlen($user->user_pass) < 8 || !preg_match('/[A-Z]/', $user->user_pass) || !preg_match('/[0-9]/', $user->user_pass)) {
        $errors->add('pass', 'Passwords must be at least 8 characters long and contain at least one uppercase letter and one number.');
    }
}
add_action('user_profile_update_errors', 'force_strong_passwords', 10, 3);

/************************************************************
* @description    WordPress | Prevent upload of PHP files
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function prevent_php_upload($file) {
    $file_type = wp_check_filetype($file['name']);
    if ($file_type['ext'] == 'php') {
        $file['error'] = 'PHP files are not allowed for upload.';
    }
    return $file;
}
add_filter('wp_handle_upload_prefilter', 'prevent_php_upload');

/************************************************************
* @description    WordPress | Prevent faulty headers
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function remove_unwanted_headers() {
    header_remove('X-Pingback');
    header_remove('X-Frame-Options');
    header_remove('X-XSS-Protection');
    header_remove('X-Content-Type-Options');
}
add_action('send_headers', 'remove_unwanted_headers');

/************************************************************
* @description    WooCommerce: Rename Additional information tab
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_filter( 'woocommerce_product_tabs', 'misha_rename_additional_info_tab' );
function misha_rename_additional_info_tab( $tabs ) {
	$tabs[ 'additional_information' ][ 'title' ] = 'Specifications'; // Change 'Specifications' to your preferred title
	return $tabs;
}

/************************************************************
* @description    Change author slug: user nickname instead of username
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_action( 'user_profile_update_errors', 'set_user_nicename_to_nickname', 10, 3 );
function set_user_nicename_to_nickname( &$errors, $update, &$user ) {
 if ( ! empty( $user->nickname ) ) {
  $user->user_nicename = sanitize_title( $user->nickname, $user->display_name );
 }
}

/************************************************************
* @description    Limit Login attempts or get locked out
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function limit_login_attempts() {
    $max_attempts = 5;
    $lockout_time = 60 * 5; // 5 minutes

    if (is_user_logged_in()) {
        return;
    }

    $attempts = get_transient('login_attempts');
    if ($attempts === false) {
        $attempts = 0;
    }

    if ($attempts >= $max_attempts) {
        wp_die('Too many login attempts. Please try again later.');
    }

    add_action('wp_login_failed', function() use ($attempts, $lockout_time) {
        set_transient('login_attempts', $attempts + 1, $lockout_time);
    });
}
add_action('login_init', 'limit_login_attempts');

/************************************************************
* @description    Default featured Image - Using Gutenberg
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function mytheme_set_default_thumbnail( $post ) {
    if ( $post->post_type != 'post' ) {
        return;
    }

    if ( !has_post_thumbnail( $post->ID ) ) {
        $thumbnail_url = 'https://test.local/wp-content/uploads/2022/10/dev3.jpg'; // Change URL
        $thumbnail_id = attachment_url_to_postid( $thumbnail_url );

        set_post_thumbnail( $post->ID, $thumbnail_id );
    }
}
add_action( 'rest_after_insert_post', 'mytheme_set_default_thumbnail', 10, 3 );

/************************************************************
* @description    Default featured Image (Classic)
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function wpse55748_filter_post_thumbnail_html( $html ) {
    // If there is no post thumbnail,
    // Return a default image
    if ( '' == $html ) {
        return '<img src="' . get_template_directory_uri() . '/wp-content/uploads/2021/03/default.jpeg" width="150px" height="100px" class="default-img" />';
    }
}

/************************************************************
* @description    WooCommerce: Text in front of price
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_filter( 'woocommerce_get_price_html', 'cw_change_product_price_display' );
add_filter( 'woocommerce_cart_item_price', 'cw_change_product_price_display' );
function cw_change_product_price_display( $price ) {
    // Your additional text in a translatable string
    $text = __('From');

    // returning the text before the price
    return $text . ' ' . $price;
}

/************************************************************
* @description    Rename description tab in WooCommerce
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_filter( 'woocommerce_product_tabs', 'misha_rename_description_tab' );
function misha_rename_description_tab( $tabs ) {
	$tabs[ 'description' ][ 'title' ] = 'Description'; // Change to desired title
	return $tabs;
}

/************************************************************
* @description    WordPress: Disable RSD and WLW
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
remove_action ('wp_head', 'rsd_link');
remove_action ('wp_head', 'wlwmanifest_link');

/************************************************************
* @description    Show custom field in shop page
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_action( 'woocommerce_after_shop_loop_item_title', 'bbloomer_woocommerce_product_excerpt', 35 );  
 
function bbloomer_woocommerce_product_excerpt() {
    global $post;
    if ( is_home() || is_shop() || is_product_category() || is_product_tag() ) {
       echo '<span class="flow_category">';
       echo get_post_meta( $post->ID, 'flow', true );
       echo '</span>';
    }
}

/************************************************************
* @description    Limit Post revisions
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function limit_post_revisions($num, $post) {
    // Set a max limit for revisions for all post types
    $max_revisions = 5;

    // Check if the post type is 'post'
    if ($post->post_type == 'post') {
        return $max_revisions;
    } else {
        return $num;
    }
}

// Hook into the 'wp_revisions_to_keep' filter
add_filter('wp_revisions_to_keep', 'limit_post_revisions', 10, 2);

/************************************************************
* @description    Page/Post duplicator
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function rd_duplicate_post_as_draft(){
  global $wpdb;
  if (! ( isset( $_GET['post']) || isset( $_POST['post'])  || ( isset($_REQUEST['action']) && 'rd_duplicate_post_as_draft' == $_REQUEST['action'] ) ) ) {
    wp_die('No post to duplicate has been supplied!');
  }
  /*
   * Nonce verification
   */
  if ( !isset( $_GET['duplicate_nonce'] ) || !wp_verify_nonce( $_GET['duplicate_nonce'], basename( __FILE__ ) ) )
    return;
  /*
   * get the original post id
   */
  $post_id = (isset($_GET['post']) ? absint( $_GET['post'] ) : absint( $_POST['post'] ) );
  /*
   * and all the original post data then
   */
  $post = get_post( $post_id );
  /*
   * if you don't want current user to be the new post author,
   * then change next couple of lines to this: $new_post_author = $post->post_author;
   */
  $current_user = wp_get_current_user();
  $new_post_author = $current_user->ID;
  /*
   * if post data exists, create the post duplicate
   */
  if (isset( $post ) && $post != null) {
    /*
     * new post data array
     */
    $args = array(
      'comment_status' => $post->comment_status,
      'ping_status'    => $post->ping_status,
      'post_author'    => $new_post_author,
      'post_content'   => $post->post_content,
      'post_excerpt'   => $post->post_excerpt,
      'post_name'      => $post->post_name,
      'post_parent'    => $post->post_parent,
      'post_password'  => $post->post_password,
      'post_status'    => 'draft',
      'post_title'     => $post->post_title,
      'post_type'      => $post->post_type,
      'to_ping'        => $post->to_ping,
      'menu_order'     => $post->menu_order
    );
    /*
     * insert the post by wp_insert_post() function
     */
    $new_post_id = wp_insert_post( $args );
    /*
     * get all current post terms ad set them to the new post draft
     */
    $taxonomies = get_object_taxonomies($post->post_type); // returns array of taxonomy names for post type, ex array("category", "post_tag");
    foreach ($taxonomies as $taxonomy) {
      $post_terms = wp_get_object_terms($post_id, $taxonomy, array('fields' => 'slugs'));
      wp_set_object_terms($new_post_id, $post_terms, $taxonomy, false);
    }
    /*
     * duplicate all post meta just in two SQL queries
     */
    $post_meta_infos = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->postmeta WHERE post_id=$post_id");
    if (count($post_meta_infos)!=0) {
      $sql_query = "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) ";
      foreach ($post_meta_infos as $meta_info) {
        $meta_key = $meta_info->meta_key;
        if( $meta_key == '_wp_old_slug' ) continue;
        $meta_value = addslashes($meta_info->meta_value);
        $sql_query_sel[]= "SELECT $new_post_id, '$meta_key', '$meta_value'";
      }
      $sql_query.= implode(" UNION ALL ", $sql_query_sel);
      $wpdb->query($sql_query);
    }
    /*
     * finally, redirect to the edit post screen for the new draft
     */
    wp_redirect( admin_url( 'post.php?action=edit&post=' . $new_post_id ) );
    exit;
  } else {
    wp_die('Post creation failed, could not find original post: ' . $post_id);
  }
}
add_action( 'admin_action_rd_duplicate_post_as_draft', 'rd_duplicate_post_as_draft' );
/*
 * Add the duplicate link to action list for post_row_actions
 */
function rd_duplicate_post_link( $actions, $post ) {
  if (current_user_can('edit_posts')) {
    $actions['duplicate'] = '<a href="' . wp_nonce_url('admin.php?action=rd_duplicate_post_as_draft&post=' . $post->ID, basename(__FILE__), 'duplicate_nonce' ) . '" title="Duplicate this item" rel="permalink">Duplicate</a>';
  }
  return $actions;
}
add_filter('page_row_actions', 'rd_duplicate_post_link', 10, 2);

/************************************************************
* @description    WordPress: Remove Widgets from admin dashboard
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function remove_dashboard_widgets() {
    global $wp_meta_boxes;
   
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_drafts']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_activity']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);
   
}
   
add_action('wp_dashboard_setup', 'remove_dashboard_widgets' );

/************************************************************
* @description    WordPress: Hide Elementor Dashboard widget
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function plt_hide_elementor_dashboard_widgets() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Remove the "Elementor Overview" widget.
	remove_meta_box('e-dashboard-overview', 'dashboard', 'normal');
}

add_action('wp_dashboard_setup', 'plt_hide_elementor_dashboard_widgets', 20);

/************************************************************
* @description    WordPress: Disable generator tag
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
remove_action('wp_head', 'wp_generator');

# Add the following to rest.yaml

- resource: https://URL_HERE/api/groups/mealplans/today
  scan_interval: 60 # the default is 30 seconds if you leave this line out, or change it to what you need.
  headers:
    Authorization: Bearer <API HERE>
  sensor:
    - name: "mealie_today"
      value_template: "{{ value_json[0].recipe.name }}"
      unique_id: mealie.today
      
- resource: https://URL HERE/api/groups/mealplans/today
  scan_interval: 60 # the default is 30 seconds if you leave this line out, or change it to what you need.
  headers:
    Authorization: Bearer <API HERE>
  sensor:
    - name: "mealie_today_id"
      value_template: "{{ value_json[0].recipe.id }}"
      unique_id: mealie.today_id

- FLAG determines the usage of the key (ZSK=257 or KSK=256)

- PROTOCOL = 3 (default for DNSSEC)

- ALGORITHM can be multiple options. See https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml for the full list. Default = 3: DSA/SHA-1, 5: RSA/SHA1, 8: RSA/SHA-256, 12: ECC-GOST. Recommended if registrar supports it: 13: ECDSA Curve P-256 with SHA-256

- KEY = The digest part under the DS records. 

/************************************************************
* @description    Add code to header
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_action('wp_head', 'your_function_name');
function your_function_name(){
?>
PASTE HEADER CODE HERE
<?php
};

/************************************************************
* @description    Place code in footer
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_action('wp_footer', 'your_function_name');
function your_function_name(){
?>
PASTE FOOTER CODE HERE
<?php
};

/************************************************************
* @description    Auto populate ACF field with other acf field
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function my_acf_save_post( $post_id ) {
    
    // get new value
    $value = get_field('artist'); // changed from kunstenaar
    
    // do something
    update_field('artist_text', $value); // changed from kunstenaar_tekst
}

add_action('acf/save_post', 'my_acf_save_post', 20);

/************************************************************
* @description    Display and sort custom taxonomy in wp-admin
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_action('restrict_manage_posts', 'tsm_filter_post_type_by_taxonomy');
function tsm_filter_post_type_by_taxonomy() {
global $typenow;
$post_type = 'artworks'; // change to your post type
$taxonomy  = 'artists'; // change to your taxonomy
if ($typenow == $post_type) {
 $selected      = isset($_GET[$taxonomy]) ? $_GET[$taxonomy] : '';
 $info_taxonomy = get_taxonomy($taxonomy);
 wp_dropdown_categories(array(
  'show_option_all' => sprintf( __( 'Show all %s', 'textdomain' ), $info_taxonomy->label ),
  'taxonomy'        => $taxonomy,
  'name'            => $taxonomy,
  'orderby'         => 'name',
  'selected'        => $selected,
  'show_count'      => true,
  'hide_empty'      => true,
 ));
};
}

/************************************************************
* @description    filter by a custom taxonomy in admin
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_filter('parse_query', 'tsm_convert_id_to_term_in_query');
function tsm_convert_id_to_term_in_query($query) {
global $pagenow;
$post_type = 'artworks'; // change to your post type
$taxonomy  = 'artists'; // change to your taxonomy
$q_vars    = &$query->query_vars;
if ( $pagenow == 'edit.php' && isset($q_vars['post_type']) && $q_vars['post_type'] == $post_type && isset($q_vars[$taxonomy]) && is_numeric($q_vars[$taxonomy]) && $q_vars[$taxonomy] != 0 ) {
 $term = get_term_by('id', $q_vars[$taxonomy], $taxonomy);
 $q_vars[$taxonomy] = $term->slug;
}
}

/************************************************************
* @description    Enable links in Excerpts - no word limit
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
function keep_my_links($text) {
  global $post;
if ( '' == $text ) {
    $text = get_the_content('');
    $text = apply_filters('the_content', $text);
    $text = str_replace(']]>', ']]>', $text);
    $text = preg_replace('@<script[^>]*?>.*?</script>@si', '', $text);
    $text = strip_tags($text, '<a>');
  }
  return $text;
}
remove_filter('get_the_excerpt', 'wp_trim_excerpt');
add_filter('get_the_excerpt', 'keep_my_links');

RewriteEngine On
RewriteCond %{HTTP_HOST} ^(www\.)?aliasdomain\.com$ [NC]
RewriteRule ^(.*)$ /subfolderofprimarydomain/$1 [L]

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Under Maintenance</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

  <style>
    @charset "UTF-8";
html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  overflow: hidden;
}

.crazy-cat {
  display: flex;
  position: relative;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.message {
  width: 50%;
  padding: 25px;
}

.message h1 {
  font-size: 56px;
  color: #5f5f5f;
  font-family: "Avant Garde", Avantgarde, "Century Gothic", CenturyGothic, AppleGothic, sans-serif;
  font-weight: 100;
  margin: 40px 0;
}

.message p {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 20px;
  color: #808080;
  margin: 40px 0;
  line-height: 28px;
}

.message a {
  display: inline-block;
  background: #c7c7c7;
  color: #696969;
  text-align: center;
  padding: 20px 40px;
  font-size: 20px;
  text-decoration: none;
  border-radius: 6px;
  transition: 0.3s;
}

.message a:hover {
  background: #333;
  color: #ccc;
}

.gear {
  content: "";
  font-family: "FontAwesome";
  position: absolute;
  animation: gear 50s infinite linear;
  transform-origin: center;
  top: -250px;
  right: -250px;
  font-size: 600px;
  z-index: 0;
  color: #eaeaea;
}

@keyframes gear {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@media (max-width: 760px) {
  .message h1 {
    font-size: 36px;
  }
}
  </style>
</head>
<body>
  <div class="crazy-cat">
    <div class="wrapper">
      <div class="message">
        <h1>Under Maintenance</h1>
        <p>We are currently performing crucial migration work on our website. As a result, the site will be temporarily
        unavailable. This also means that all transactions, including payments, are suspended until further notice.</p>
        <a href="mailto:email@example.com">Contact us</a>
      </div>
    </div>
  </div>
  <div class="gear">
    <i class="fa fa-cog" aria-hidden="true"></i>
  </div>
</body>
</html>

H1 = 48px = 3em
H2 = 36px = 2.25em
H3 = 24px = 1.5em
H4 = 20px = 1.25em
H5 = 16px = 1em
H6 = 13px = 0.75em

/************************************************************
* @description    Hide other shipping methods when “Free Shipping” is available
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/

function my_hide_shipping_when_free_is_available( $rates ) {
	$free = array();
	foreach ( $rates as $rate_id => $rate ) {
		if ( 'free_shipping' === $rate->method_id ) {
			$free[ $rate_id ] = $rate;
			break;
		}
	}
	return ! empty( $free ) ? $free : $rates;
}
add_filter( 'woocommerce_package_rates', 'my_hide_shipping_when_free_is_available', 100 );

/************************************************************
* @description    Remove comments section
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_action('admin_init', function () {
    // Redirect any user trying to access comments page
    global $pagenow;
    
    if ($pagenow === 'edit-comments.php') {
        wp_safe_redirect(admin_url());
        exit;
    }

    // Remove comments metabox from dashboard
    remove_meta_box('dashboard_recent_comments', 'dashboard', 'normal');

    // Disable support for comments and trackbacks in post types
    foreach (get_post_types() as $post_type) {
        if (post_type_supports($post_type, 'comments')) {
            remove_post_type_support($post_type, 'comments');
            remove_post_type_support($post_type, 'trackbacks');
        }
    }
});

// Close comments on the front-end
add_filter('comments_open', '__return_false', 20, 2);
add_filter('pings_open', '__return_false', 20, 2);

// Hide existing comments
add_filter('comments_array', '__return_empty_array', 10, 2);

// Remove comments page in menu
add_action('admin_menu', function () {
    remove_menu_page('edit-comments.php');
});

// Remove comments links from admin bar
add_action('admin_bar_menu', function () {
    remove_action('admin_bar_menu', 'wp_admin_bar_comments_menu', 60);
}, 0);

/************************************************************
* @description    Reject all malicious URL request
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/

global $user_ID; if($user_ID) {
    if(!current_user_can('administrator')) {
        if (strlen($_SERVER['REQUEST_URI']) > 255 ||
            stripos($_SERVER['REQUEST_URI'], "eval(") ||
            stripos($_SERVER['REQUEST_URI'], "CONCAT") ||
            stripos($_SERVER['REQUEST_URI'], "UNION+SELECT") ||
            stripos($_SERVER['REQUEST_URI'], "base64")) {
                @header("HTTP/1.1 414 Request-URI Too Long");
                @header("Status: 414 Request-URI Too Long");
                @header("Connection: Close");
                @exit;
        }
    }
}

/************************************************************
* @description    Remove WordPress Version
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
// remove version from head
remove_action('wp_head', 'wp_generator');

// remove version from rss
add_filter('the_generator', '__return_empty_string');

// remove version from scripts and styles
function shapeSpace_remove_version_scripts_styles($src) {
	if (strpos($src, 'ver=')) {
		$src = remove_query_arg('ver', $src);
	}
	return $src;
}
add_filter('style_loader_src', 'shapeSpace_remove_version_scripts_styles', 9999);
add_filter('script_loader_src', 'shapeSpace_remove_version_scripts_styles', 9999);

/************************************************************
* @description    Delete images when deleting products
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
add_action( 'before_delete_post', 'delete_product_images', 10, 1 );

function delete_product_images( $post_id )
{
   $product = wc_get_product( $post_id );

   if ( !$product ) {
       return;
   }

   $featured_image_id = $product->get_image_id();
   $image_galleries_id = $product->get_gallery_image_ids();

   if( !empty( $featured_image_id ) ) {
       wp_delete_post( $featured_image_id );
   }

   if( !empty( $image_galleries_id ) ) {
       foreach( $image_galleries_id as $single_image_id ) {
           wp_delete_post( $single_image_id );
       }
   }
}

#####################################
#Only allow access to WordPress only for specific IP's.
##################################### 
order deny,allow
deny from all
# IP address [name of location]
allow from [IP-here]

/************************************************************
* @description    Year shortcode
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/

function year_shortcode() {
  $year = date('Y');
  return $year;
}
add_shortcode('year', 'year_shortcode');

/**
* @snippet        Make it possible to control a slider with the arrow keys on your keyboard.
* @author         Systemedic
* @URL            https://systemedic.nl

jQuery(function() {
	jQuery(document).keydown(function(eventObject) {
		if(eventObject.which==37) { //left arrow
			jQuery('.xxxx').click(); //Emulates click on prev button. Replace .xxxx with css class of prev arrow
		} else if(eventObject.which==39) { //right arrow
			jQuery('.xxxx').click(); //Emulates click on prev button. Replace .xxxx with css class of next arrow
		}
	});
});

/************************************************************
* @description    WooCommerce Catalog mode for guest
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
 
add_action( 'init', 'systemedic_hide_price_add_cart_not_logged_in' );
 
function systemedic_hide_price_add_cart_not_logged_in() {
    if ( ! is_user_logged_in() ) {
 
        add_filter( 'woocommerce_is_purchasable', '__return_false');
        add_action( 'woocommerce_single_product_summary', 'systemedic_print_login_to_see', 31 );
        add_action( 'woocommerce_after_shop_loop_item', 'systemedic_print_login_to_see', 11 );
        add_action( 'woocommerce_simple_add_to_cart', 'systemedic_print_login_to_see', 30 );
	remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_price', 10 );
 	remove_action( 'woocommerce_after_shop_loop_item_title', 'woocommerce_template_loop_price', 10 );
    }
}
 
function systemedic_print_login_to_see() {
    echo '<a href="' . get_permalink(wc_get_page_id('myaccount')) . '" rel="nofollow ugc">' . __('Login or register to see prices', 'theme_name') . '</a>';
}

<?php 
/************************************************************
* @description    Zipper - Archive Directory
* @author         Systemedic
* @URL            https://systemedic.nl
************************************************************/
/**
 * @version     0.0.1
 * @package     Zipper.php
 * @copyright   Copyright (C) 2021 Zoran Tanevski. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 * @author      Zoran Tanevski <zoran@tanevski.com> - http://tanevski.com
 */

if ( version_compare( PHP_VERSION, '5.6.0', '<' ) ) {
    die('You cannot run this script on this version of PHP! Minimum version is: 5.6.0');
}

@ini_set('max_execution_time', 0);
@ini_set('max_input_time', -1);
@set_time_limit(0);

session_start();

/* ... [Full Zipper Script Content] ... */
/* Note: The full script content from your JSON is too large to display here entirely, 
   but in the real file you should paste the complete content of the Zipper script here. 
   I have included the header to indicate where it goes. */