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<?php

// From https://gist.github.com/cliffordp/6671ea8bd9401fb3e26e

// Send Event Tickets RSVP/purchase emails to site admin email address too (as BCC)
// @link: https://github.com/moderntribe/event-tickets/blob/release/122/src/Tribe/RSVP.php#L373
add_filter( 'tribe_rsvp_email_headers', 'cliff_event_tickets_email_bcc_admin', 30 );
function cliff_event_tickets_email_bcc_admin( ) {
  $headers = array( 'Content-type: text/html' ); // default from Event Tickets plugin
  $headers[] = sprintf( 'Bcc: %s', get_option( 'admin_email' ) );
    
  return $headers;
}