# Pastebin t5ewbv7W
<?php
require_once( __DIR__ . "/vendor/autoload.php" );

$api = new \Mediawiki\Api\MediawikiApi( "http://www.wikidata.org/w/api.php" );
$repo = new \Wikibase\Api\Repos\EntityRevisionRepo( $api );
$entityRev = $repo->getFromId( 'Q4115189' );
$entityRev->getData()->setLabel( 'en', 'test' );
$saver = new \Wikibase\Api\Savers\EntityRevisionSaver( $api );
$saver->save( $entityRev );