// docs/reindex.asciidoc:850

[source, php]
----
$params = [
    'body' => [
        'source' => [
            'index' => 'twitter',
        ],
        'dest' => [
            'index' => 'new_twitter',
            'version_type' => 'external',
        ],
        'script' => [
            'source' => 'if (ctx._source.foo == \'bar\') {ctx._version++; ctx._source.remove(\'foo\')}',
            'lang' => 'painless',
        ],
    ],
];
$response = $client->reindex($params);
----
