kompass/modules/event-participants/Controllers/class-createevent.php

<?php
namespace Bdp\Modules\EventParticipants\Controllers;

use Bdp\Modules\EventParticipants\Models\EventGroup;
use Bdp\Modules\EventParticipants\Models\EventParticipant;

class CreateEvent {
	public function __construct() {
		global $_POST, $_REQUEST, $dbHandler;

        $use_data = ['event_name', 'event_email', 'startdatum', 'enddatum','max_participants', 'max_volunteers', 'amount_reduced', 'amount_default', 'amount_social', 'contributing_tribes'];
        $post_data = [];
        foreach ($_POST as $key => $value) {
            if (in_array($key, $use_data)) {
                $post_data[$key] = $value;
            }
        };

        $post_data['amount_reduced'] = str_replace(',', '.', $_POST['amount_reduced']);
        $post_data['amount_default'] = str_replace(',', '.', $_POST['amount_default']);
        $post_data['amount_social'] = str_replace(',', '.', $_POST['amount_social']);

        $post_data['contributing_tribes'] = str_replace( PHP_EOL, ',', $post_data['contributing_tribes'] );

		$new_event_id = $dbHandler->insertRows(
			'kompass_veranstaltungen_index',
			$post_data,
		);
		kompass_print_message_box(__('Event created successfull.', BDP_LV_PLUGIN_SLUG));

        $pageName = $post_data['event_name'] . ' - ' .__('Registration', BDP_LV_PLUGIN_SLUG);
            $page_id = wp_insert_post(array(
                'post_title' => $pageName,
                'post_content' => '{{event-' . $new_event_id . '}}',
                'post_status' => 'publish',
                'post_type' => 'page',
            ));

        new ListEventsController();
	}
}