WooCommerce 4의 WooCommerce 제품에 사용자 정의 재고 상태를 추가하는 방법은 무엇입니까?

<code class="php">function filter_woocommerce_product_stock_status_options( $status ) {
    // Add new statuses
    $status['pre_order'] = __('Pre Order', 'woocommerce');
    $status['contact_us'] = __('Contact us', 'woocommerce');

    return $status;
}
add_filter( 'woocommerce_product_stock_status_options', 'filter_woocommerce_product_stock_status_options', 10, 1 );</code>

<code class="php">// Availability text
function filter_woocommerce_get_availability_text( $availability, $product ) {
    // Get stock status
    switch( $product->get_stock_status() ) {
        case 'pre_order':
            $availability = __( 'Pre Order', 'woocommerce' );
            break;
        case 'contact_us':
            $availability = __( 'Contact us', 'woocommerce' );
            break;
    }

    return $availability;
}
add_filter( 'woocommerce_get_availability_text', 'filter_woocommerce_get_availability_text', 10, 2 );

// Availability CSS class
function filter_woocommerce_get_availability_class( $class, $product ) {
    // Get stock status
    switch( $product->get_stock_status() ) {
        case 'pre_order':
            $class = 'pre-order';
            break;
        case 'contact_us':
            $class = 'contact-us';
            break;
    }

    return $class;
}
add_filter( 'woocommerce_get_availability_class', 'filter_woocommerce_get_availability_class', 10, 2 );</code>

<code class="php">// Admin stock html
function filter_woocommerce_admin_stock_html( $stock_html, $product ) {
    // Simple
    if ( $product->is_type( 'simple' ) ) {
        // Get stock status
        $product_stock_status = $product->get_stock_status();
    // Variable
    } elseif ( $product->is_type( 'variable' ) ) {
        foreach( $product->get_visible_children() as $variation_id ) {
            // Get product
            $variation = wc_get_product( $variation_id );

            // Get stock status
            $product_stock_status = $variation->get_stock_status();
        }
    }

    // Stock status
    switch( $product_stock_status ) {
        case 'pre_order':
            $stock_html = '<mark class=&quot;pre-order&quot; style=&quot;background:transparent none;color:#33ccff;font-weight:700;line-height:1;&quot;>' . __( 'Pre order', 'woocommerce' ) . '</mark>';
            break;
        case 'contact_us':
            $stock_html = '<mark class=&quot;contact-us&quot; style=&quot;background:transparent none;color:#cc33ff;font-weight:700;line-height:1;&quot;>' . __( 'Contact us', 'woocommerce' ) . '</mark>';
            break;
    }

    return $stock_html;
}
add_filter( 'woocommerce_admin_stock_html', 'filter_woocommerce_admin_stock_html', 10, 2 );</code>