1// indices/put-mapping.asciidoc:536
2
3[source, php]
4----
5$params = [
6    'index' => 'my_index',
7    'body' => [
8        'properties' => [
9            'user_id' => [
10                'type' => 'alias',
11                'path' => 'user_identifier',
12            ],
13        ],
14    ],
15];
16$response = $client->indices()->putMapping($params);
17----
18