Custom Booking Summary Field - Attendee List

<?php
/*
 * paste in your theme functions.php
 * after adding in your functions.php, go to Events > Bookings > Recent Bookings or by clicking an specific
 * click on the Gear icon and drag&drop field "Attendee Name"
 */

function my_em_bookings_table_cols_template_attendee21($template, $EM_Bookings_Table){
    $template['attendee_name'] = 'Attendee Name';
    return $template;
}
add_action('em_bookings_table_cols_template', 'my_em_bookings_table_cols_template_attendee21',10,2);

function my_em_custom_booking_form_cols_attendee_list1($val, $col, $EM_Booking, $EM_Bookings_Table, $csv){
    if( $col == 'attendee_name' ){
        $EM_Tickets_Bookings = $EM_Booking->get_tickets_bookings();
        $attendee_datas = EM_Attendees_Form::get_booking_attendees($EM_Booking);
        $attendee_list = "";
        foreach( $EM_Tickets_Bookings->tickets_bookings as $EM_Ticket_Booking ){
            //Display ticket info
            if( !empty($attendee_datas[$EM_Ticket_Booking->ticket_id]) ){
                $val .= "Ticket name: ".$EM_Ticket_Booking->get_ticket()->ticket_name."|";
                foreach( $attendee_datas[$EM_Ticket_Booking->ticket_id] as $attendee_title => $attendee_data ){
                    $val .= $attendee_title."|";
                    foreach( $attendee_data as $field_label => $field_value){
                        $val .=  $field_label .': '.$field_value."|";
                        $val .= '<br>';
                    }
                    $val .= '<br>';
                }
                $val .= '<br>';
            }
        }
    }
    return $val;
}
add_filter('em_bookings_table_rows_col','my_em_custom_booking_form_cols_attendee_list1', 10, 5);