// docs/reindex.asciidoc:784

[source, php]
----
$params = [
    'body' => [
        'source' => [
            'index' => 'metricbeat-*',
        ],
        'dest' => [
            'index' => 'metricbeat',
        ],
        'script' => [
            'lang' => 'painless',
            'source' => 'ctx._index = \'metricbeat-\' + (ctx._index.substring(\'metricbeat-\'.length(), ctx._index.length())) + \'-1\'',
        ],
    ],
];
$response = $client->reindex($params);
----
