1// getting-started.asciidoc:691
2
3[source, php]
4----
5$params = [
6    'index' => 'bank',
7    'body' => [
8        'size' => 0,
9        'aggs' => [
10            'group_by_state' => [
11                'terms' => [
12                    'field' => 'state.keyword',
13                    'order' => [
14                        'average_balance' => 'desc',
15                    ],
16                ],
17                'aggs' => [
18                    'average_balance' => [
19                        'avg' => [
20                            'field' => 'balance',
21                        ],
22                    ],
23                ],
24            ],
25        ],
26    ],
27];
28$response = $client->search($params);
29----
30