Elasticsearch 統計某欄位有值的文件數

$EsModel = new EsModel();
$protcountParams['index'] = $index;
$protcountParams['type'] = 'ips';
$protcountParams['from'] = 0;
$protcountParams['size'] = 0;
$protcountParams['body']['query'] = $search;
$protcountParams['body']['aggs']['age_count']['value_count'] = array('field'=>"port_c");
$port_info = $EsModel->search($protcountParams);
var_dump($port_info["aggregations"]["age_count"]["value"]);exit;

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