<?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/place/v2/suggestion';
    
    // 构造请求参数
    $param['query']   = '天安门';
    $param['region']   = '北京';
    $param['city_limit']   = 'true';
    $param['output']   = 'json';
    $param['ak']   = $ak;

    $res = request_get($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");
?>

{
    "status":0,
    "message":"ok",
    "result":[
        {
            "name":"天安门广场",
            "location":{
                "lat":39.909652,
                "lng":116.404177
            },
            "uid":"c9b5fb91d49345bc5d0d0262",
            "province":"北京市",
            "city":"北京市",
            "district":"东城区",
            "business":"",
            "cityid":"131",
            "tag":"旅游景点",
            "address":"北京市-东城区-东长安街",
            "children":[
                {
                    "uid":"797c4f6023068d0ceedfcaf9",
                    "name":"天安门广场-出入口 北京市东城区",
                    "show_name":"出入口"
                },
                {
                    "uid":"ad764cbdedc637ec6d3e1b91",
                    "name":"天安门广场-出口 北京市东城区",
                    "show_name":"出口"
                }
            ],
            "adcode":"110101"
        },
        {
            "name":"天安门",
            "location":{
                "lat":39.915119,
                "lng":116.403963
            },
            "uid":"65e1ee886c885190f60e77ff",
            "province":"北京市",
            "city":"北京市",
            "district":"东城区",
            "business":"",
            "cityid":"131",
            "tag":"古建筑",
            "address":"北京市-东城区-长安街",
            "children":[
                
            ],
            "adcode":"110101"
        },
        {
            "name":"天安门东-地铁站",
            "location":{
                "lat":39.914082,
                "lng":116.407913
            },
            "uid":"940aeb3c98d5a0218a2fb5de",
            "province":"北京市",
            "city":"北京市",
            "district":"东城区",
            "business":"",
            "cityid":"131",
            "tag":"地铁站",
            "address":"",
            "children":[
                
            ],
            "adcode":"110101"
        },
        {
            "name":"天安门广场-国旗",
            "location":{
                "lat":39.91328,
                "lng":116.403931
            },
            "uid":"4ae2adcf574bcd2b38221c66",
            "province":"北京市",
            "city":"北京市",
            "district":"东城区",
            "business":"",
            "cityid":"131",
            "tag":"旅游景点",
            "address":"北京市-东城区-天安门广场内",
            "children":[
                
            ],
            "adcode":"110101"
        },
        {
            "name":"天安门西-地铁站",
            "location":{
                "lat":39.913776,
                "lng":116.398036
            },
            "uid":"002975204d3b1e9b9968b4de",
            "province":"北京市",
            "city":"北京市",
            "district":"西城区",
            "business":"",
            "cityid":"131",
            "tag":"地铁站",
            "address":"",
            "children":[
                
            ],
            "adcode":"110102"
        },
        {
            "name":"天安门东地铁站-b口",
            "uid":"448961a899f372b7077ce838",
            "province":"",
            "city":"",
            "district":"",
            "business":"",
            "cityid":"131",
            "tag":"",
            "address":"北京市-东城区",
            "children":[
                
            ]
        },
        {
            "name":"天安门-入口",
            "location":{
                "lat":39.914939,
                "lng":116.404137
            },
            "uid":"fd975efc10193656734b879a",
            "province":"北京市",
            "city":"北京市",
            "district":"东城区",
            "business":"",
            "cityid":"131",
            "tag":"出入口",
            "address":"北京市-东城区-天安门内",
            "children":[
                
            ],
            "adcode":"110101"
        },
        {
            "name":"天安门广场东-公交车站",
            "location":{
                "lat":39.908018,
                "lng":116.405975
            },
            "uid":"bc3118720ad264138a36ee6f",
            "province":"北京市",
            "city":"北京市",
            "district":"东城区",
            "business":"",
            "cityid":"131",
            "tag":"公交站",
            "address":"",
            "children":[
                
            ],
            "adcode":"110101"
        },
        {
            "name":"天安门-城楼检票处(入口)",
            "location":{
                "lat":39.915739,
                "lng":116.403663
            },
            "uid":"f7a0d122f3307a767dc876f1",
            "province":"北京市",
            "city":"北京市",
            "district":"东城区",
            "business":"",
            "cityid":"131",
            "tag":"出入口",
            "address":"北京市-东城区-天安门内",
            "children":[
                
            ],
            "adcode":"110101"
        },
        {
            "name":"天安门东-公交车站",
            "location":{
                "lat":39.914198,
                "lng":116.408332
            },
            "uid":"947c13ba353f9123dbd891fb",
            "province":"北京市",
            "city":"北京市",
            "district":"东城区",
            "business":"",
            "cityid":"131",
            "tag":"公交站",
            "address":"",
            "children":[
                
            ],
            "adcode":"110101"
        }
    ]
}