getLagTimes.php

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<?php
require_once( __DIR__ . '/Maintenance.php' );

class GetLagTimes extends Maintenance {
        public function __construct() {
                parent::__construct();
                $this->mDescription = "Dump replication lag times";
        }

        public function execute() {
                $lb = wfGetLB();

                if ( $lb->getServerCount() == 1 ) {
                        $this->error( "This script dumps replication lag times, but you don't seem to have\n"
                                                  . "a multi-host db server configuration." );
                } else {
                        $lags = $lb->getLagTimes();
                        foreach ( $lags as $n => $lag ) {
                                $host = $lb->getServerName( $n );
                                if ( IP::isValid( $host ) ) {
                                        $ip = $host;
                                        $host = gethostbyaddr( $host );
                                } else {
                                        $ip = gethostbyname( $host );
                                }
                                $starLen = min( intval( $lag ), 40 );
                                $stars = str_repeat( '*', $starLen );
                                $this->output( sprintf( "%10s %20s %3d %s\n", $ip, $host, $lag, $stars ) );
                        }
                }
        }
}

$maintClass = "GetLagTimes";
require_once( RUN_MAINTENANCE_IF_MAIN );