code related to WordPress and the WooCommerce Frontend Manager (WCFM) plugin.

some code related to WordPress and the WooCommerce Frontend Manager (WCFM) plugin.
add_filter('wcfm_form_custom_validation', function ($form_data, $wcfm_screen) {
    // Your custom validation logic goes here
    if (isset($form_data['some_field']) && empty($form_data['some_field'])) {
        $error_message = 'Please fill out the required field.';
        // You can add the error message to the form data for later use
        $form_data['error'] = $error_message;
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