Adds ticket header image to event

ticket_header_img.php

<? php
// Show the ticket header img
if ( ! isset( $ticket_header_img_rendered ) ) {
    $img_id = Tribe__Tickets__Tickets_Handler::instance()->get_header_image_id( $ticket->get_event()->ID );
    $header_img = wp_get_attachment_image_src( $img_id, 'full' );
    if ( ! $header_img ) break;
    echo "<img src='{$header_img[0]}' />";
    $ticket_header_img_rendered = true;
}