frm_skip_form_action

Use the code below if you would like to stop a form action when one of two fields is empty. Replace 116 with your action ID. Replace 104 and 105 with your field IDs.

add_filter( 'frm_skip_form_action', 'form_action_conditions', 10, 2 );
function form_action_conditions( $skip_this_action, $args ) {
    if ( $args['action']->ID == 115 ) {//replace 115 with your action ID
        if ( is_object( $args['entry'] ) ) {
          $entry = $args['entry'];
        } else {
          $entry = FrmEntry::getOne( $args['entry'], true );
        }

        $field1 = 104;// Replace 104 with your field ID
        $field2 = 105;// Replace 105 with another field ID
        
        $val1 = isset( $entry->metas[ $field1 ] ) ? $entry->metas[ $field1 ] : '';
        $val2 = isset( $entry->metas[ $field2 ] ) ? $entry->metas[ $field2 ] : '';

        if ( $val1 == '' || $val2 == '') {
            $skip_this_action = true;
        }
    }
    return $skip_this_action;
}

Stop the update email notifications, but only if a non-admin submits the form.

add_filter( 'frm_skip_form_action', 'stop_admin_update_email', 10, 2 );
function stop_admin_update_email( $skip_this_action, $args ) {
  if ( $args['action']->ID == 115 ) { //replace 115 with your action ID
    if ( current_user_can( 'administrator' ) ) {
      $skip_this_action = true;
    }
  }
  return $skip_this_action;
}

There may be times when an email or another form action is set to trigger on update or after successful payment, but you really only want it to trigger once. This example uses two hooks: one to set when an action has been triggered, and one to stop it the next time.

add_filter( 'frm_skip_form_action', 'stop_multiple_actions', 20, 2 );
function stop_multiple_actions( $skip_this_action, $args ) {
  if ( $args['action']->ID == 115 && ! $skip_this_action ) { //replace 115 with your action ID
    $entry_id =  $args['entry'];
    if ( is_object( $args['entry'] ) ) {
        $entry_id = $args['entry']->id;
    }
    $option_key =  'frm_triggered_' . $args['action']->ID . '_' . $entry_id;
    $was_triggered = get_option( $option_key );
    if ( $was_triggered ) {
        $skip_this_action = true;
    }
  }
  return $skip_this_action;
}

add_action( 'frm_trigger_email_action', 'frm_set_action_triggered', 30, 2 ); // 'email' will need to be replaced with the key for the action
function frm_set_action_triggered( $action, $entry ) {
  if ( $action->ID == 115 ) { //replace 115 with your action ID
    $option_key =  'frm_triggered_' . $action->ID . '_' . $entry->id;
    update_option( $option_key, true );
  }
}

The name of the 'frm_trigger_email_action' hook is dynamic, based on what type of action is being triggered.

Some actions may trigger more than once. A recurring payment can trigger an action after some time has passed. This example stops the form action if the entry was not created on the same day.

add_filter( 'frm_skip_form_action', 'stop_multiple_actions', 20, 2 );
function stop_multiple_actions( $skip_this_action, $args ) {
  if ( $args['action']->ID == 115 && ! $skip_this_action ) { //replace 115 with your action ID
        if ( is_object( $args['entry'] ) ) {
          $entry = $args['entry'];
        } else {
          $entry = FrmEntry::getOne( $args['entry'] );
        }

        if ( strtotime($entry->created_at) < strtotime('-24 hours')  ) {
            $skip_this_action = true;
        }
  }
  return $skip_this_action;
}