// docs/reindex.asciidoc:699

[source, php]
----
$params = [
    'body' => [
        'source' => [
            'index' => 'test',
        ],
        'dest' => [
            'index' => 'test2',
        ],
        'script' => [
            'source' => 'ctx._source.tag = ctx._source.remove("flag")',
        ],
    ],
];
$response = $client->reindex($params);
----