custom validation message not showing

custom tag:

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_kml_probetraining_customfield' );

function wpcf7_add_form_tag_kml_probetraining_customfield() {
    wpcf7_add_form_tag( array('kml_probetraining_termine_select', 'kml_probetraining_termine_select*'),
   'wpcf7_kml_probetraining_customfield_form_tag_handler', array( 'name-attr' => true ) );
    }
    
function wpcf7_kml_probetraining_customfield_form_tag_handler ( $tag ) {
        $tag = new WPCF7_FormTag( $tag );

    if ( empty( $tag->name ) ) {
        return '';
    }
    
    $events = tribe_get_events( array(
             'posts_per_page' => -1,
             // 'start_date' => date( 'Y-m-d H:i:s' ),
             'start_date' => 'now',
             's' => "Probetraining"
    ) );
   
    $output = '';
    $output .= sprintf( '<span class="wpcf7-form-control-wrap" %s">', $tag->name );
    $output .= sprintf( "<select name='" . $tag['name'] . "' id='" . $tag['name'] . "' class=\"wpcf7-form-control wpcf7-select wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\">", $tag->name );
    $output .= sprintf( '<option value=\"\" selected disabled hidden>Termin ausw?hlen:</option>', $tag->name );
    

    foreach ( $events as $event ) {
        $output .= sprintf( '<option value="' . $event->EventStartDate . $event->post_title .'">' . custom_kml_event_schedule_format( $event ) . $event->post_title . '</option>', $tag->name );
    } // close foreach
    
   $output .=  '</select>';
   $output .=  '</span>';
    
   return $output;
} // close function

custom filter:

add_filter( 'wpcf7_validate_kml_probetraining_termine_select', 'wpcf7_kml_probetraining_termine_select_validation_filter', 10, 2 );
add_filter( 'wpcf7_validate_kml_probetraining_termine_select*', 'wpcf7_kml_probetraining_termine_select_validation_filter', 10, 2 );

function wpcf7_kml_probetraining_termine_select_validation_filter( $result, $tag ) {
    $tag = new WPCF7_FormTag( $tag );

    $name = $tag->name;

    if ( isset( $_POST[$name] ) && is_array( $_POST[$name] ) ) {
        foreach ( $_POST[$name] as $key => $value ) {
            if ( '' === $value ) {
                unset( $_POST[$name][$key] );
            }
        }
    }

    $empty = ! isset( $_POST[$name] ) || empty( $_POST[$name] ) && '0' !== $_POST[$name];

    if ( $tag->is_required() && $empty ) {
        $result->invalidate( $tag, wpcf7_get_message( 'invalid_required' ) );
    }

    return $result;
}

validation works, but the validation error message is not shown. what needs to be added to make the message appear?

• This topic was modified 4 years, 4 months ago by tremch1973.