<?php 
    // 此处填写你在控制台-应用管理-创建应用后获取的AK
    $ak = '您的AK';
    
    // 发起一个http get请求，并返回请求的结果
    // $url字段为请求的地址
    // $param字段为请求的参数
    function request_get($url = '', $param = array()) {
        if (empty($url) || empty($param)) {
            return false;
        }
        
        $getUrl = $url . "?" . http_build_query($param);
        $curl = curl_init(); // 初始化curl
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); // 跳过证书检查   
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2); // 从证书中检查SSL加密算法是否存在
        curl_setopt($curl, CURLOPT_URL, $getUrl); // 抓取指定网页
        curl_setopt($curl, CURLOPT_TIMEOUT, 1000); // 设置超时时间1秒
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // curl不直接输出到屏幕
        curl_setopt($curl, CURLOPT_HEADER, 0); // 设置header
        $data = curl_exec($curl); // 运行curl

        if (!$data) {
            print("an error occured in function request_get(): " . curl_error($curl) . "\n");
        }

        curl_close($curl);
        
        return $data;
    }

    // 请求地址
    $url = 'https://api.map.baidu.com/locapi/v2';
    
    // 构造请求参数
    $param['']   = 'undefined';

    $res = request_get($url, $param);

    // 将原始返回的结果打印出来
    print("请求的原始返回结果为:\n");
    print($res . "\n");
?>

{

    "errcode": 0,
    "msg": "Query success.",
    "body": [
        {
            "type": 2,
            "location": "116.298457,39.848625",
            "radius": 41,
            "country": "中国",
            "province": "北京市",
            "city": "北京市",
            "citycode": "131",
            "district": "丰台区",
            "road": "丰台南路44号",
            "ctime": "1551178833",
            "indoor": "1",
            "error": 0
        },
        {
            "type": 4,
            "location": "107.614218,-6.941022",
            "radius": 111,
            "country": "Indonesia",
            "province": "Jawa Barat",
            "city": "Bandung City",
            "citycode": "34544",
            "district": "",
            "road": "Jalan Sriwijaya",
            "ctime": "1551178833",
            "indoor": "0",
            "error": 0
        },
        {
            "type": 2,
            "location": "116.352743,39.941695",
            "radius": 15,
            "country": "中国",
            "province": "北京市",
            "city": "北京市",
            "citycode": "131",
            "district": "西城区",
            "road": "西直门外大街1号院-3号",
            "ctime": "1551178833",
            "bldg": "bjxcqkdmall",
            "bldgid": "1266783613064577023",
            "bldgname": "凯德MALL(西直门嘉茂店)",
            "floor": "f4",
            "indoor": "1",
            "error": 0
        }
    ]
}