Code-Snippets-Functions/Execute a function on a child site/WordPress/disable-pingbacks.txt

function sert_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', 'sert_no_self_ping' );