Class ES : 根据 Elasticsearch API 编写的搜索工具类，以下为PHP代码：

ES::$INDEX = 'geo_index';

// 创建包含geo_point类型字段的索引类型
$data = json_encode([
	'mappings' => [
		'geo_type' => [
			'properties' => [
				'username' => ['type'=>'text'],
				'location' => ['type'=>'geo_point']
			]
		]
	]
]);
$cmd = "curl -XPUT http://192.168.56.101:9200/geo_index -d '{$data}'";
echo shell_exec($cmd);

// 插入数据
$data = json_encode([
	'username' => 'xd'.time(),
	'location' => [
		'lat' => 40.12,
		'lon' => -71.34
	]
]);
$cmd = "curl -XPOST http://192.168.56.101:9200/geo_index/geo_type -d '{$data}'";
echo shell_exec($cmd);

// 矩形区域搜索
$data = < <<JSON
{
  "query": {
	"bool": {
	  "filter": {
		"geo_bounding_box": {
		  "location": {
			"top_left": {
			  "lat": 40.73,
			  "lon": -74.1
			},
			"bottom_right": {
			  "lat": 40.01,
			  "lon": -71.12
			}
		  }
		}
	  }
	}
  }
}
JSON;
$response = ES::bodySearch('geo_type', json_decode($data, true));

// 距离搜索
$data = <<<JSON
{
  "query": {
	"bool": {
	  "filter": {
		"geo_distance": {
		  "distance": "1000km",
		  "location": {
			"lat": 40.73,
			"lon": -74.1
		  }
		}
	  }
	}
  },
  "sort": [
	{
	  "_geo_distance": {
		"location": {
		  "lat": 40.73,
		  "lon": -74.1
		},
		"order": "asc"
	  }
	}
  ]
}
JSON;
$response = ES::bodySearch('geo_type', json_decode($data, true));

// 多边形区域搜索
$data = <<<JSON
{
  "query": {
	"bool": {
	  "filter": {
		"geo_polygon": {
		  "location": {
			"points": [
			  {
				"lat": 40,
				"lon": -70
			  },
			  {
				"lat": 30,
				"lon": -80
			  },
			  {
				"lat": 50,
				"lon": -90
			  }
			]
		  }
		}
	  }
	}
  }
}
JSON;
$response = ES::bodySearch('geo_type', json_decode($data, true));