Custom Product Text Field for WooCommerce

/**
 * Snippet Name:     Custom Product Text Field for WooCommerce
 * Snippet Author:   coding-bunny.com
 * Description:      Adds a custom text field on WooCommerce product pages, saves user input, and displays it in the cart, checkout, and order details.
 */

/**
 * Adds a custom text input field on the WooCommerce product page.
 */
add_action( 'woocommerce_before_add_to_cart_button', 'cb_custom_product_text_field' );
function cb_custom_product_text_field() {
    global $product;
    echo '<div class="cb_custom_product_text_field">
            <label for="custom-text">Personalize Product</label><br>
            <input type="text" id="custom-text" name="custom-text" placeholder="Enter your custom text here">
          </div>';
}

/**
 * Saves the custom text input in the cart item data.
 */
add_filter( 'woocommerce_add_cart_item_data', 'cb_save_custom_text_to_cart_data', 10, 3 );
function cb_save_custom_text_to_cart_data( $cart_item_data, $product_id, $variation_id ) {
    if ( !empty( $_POST['custom-text'] ) ) {
        $cart_item_data['custom-text'] = sanitize_text_field( $_POST['custom-text'] );
    }
    return $cart_item_data;
}

/**
 * Displays the custom text input in the cart, checkout, and order review pages.
 */
add_filter( 'woocommerce_get_item_data', 'cb_show_custom_field_data_under_product_name', 10, 2 );
function cb_show_custom_field_data_under_product_name( $item_data, $cart_item ) {
    if ( !empty( $cart_item['custom-text'] ) ) {
        $item_data[] = array(
            'key'     => __('Custom Text', 'woocommerce'),
            'value'   => esc_html( $cart_item['custom-text'] ),
        );
    }
    return $item_data;
}

/**
 * Saves the custom text input as order meta data, so it appears in the order details.
 */
add_action( 'woocommerce_checkout_create_order_line_item', 'cb_add_custom_field_data_as_order_meta', 10, 4 );
function cb_add_custom_field_data_as_order_meta( $item, $cart_item_key, $values, $order ) {
    if ( !empty( $values['custom-text'] ) ) {
        $item->add_meta_data( __('Custom Text:', 'woocommerce'), esc_html( $values['custom-text'] ) );
    }
}