no-self-ping.php

<?php
/**
 * Keine eigenen Pingbacks zulassen
 * 
 */
function democratic_no_self_ping( &$links ) {
  $home = get_option( 'home' );
  foreach ( $links as $l => $link )
  if ( 0 === strpos( $link, $home ) )
  unset($links[$l]);
}

add_action( 'pre_ping', 'democratic_no_self_ping' );