Use PHP to obtain countries, provinces, cities, and surrounding data based on geographical coordinates

Function: When the App obtains the user's geographical coordinates, it can know the country, province, city, and surrounding data of the user based on the coordinates.

Principle: Based on Baidu Geocoding API implementation, you need to register as a Baidu developer first, and then apply for Baidu AK (key)
Geocoding.class.php

<?php/**
 * 根据地理坐标获取国家、省份、城市，及周边数据类(利用百度Geocoding API实现)
 * 百度密钥获取方法：http://lbsyun.baidu.com/apiconsole/key?application=key（需要先注册百度开发者账号）
 * Date:    2015-07-30
 * Author:  fdipzone
 * Ver: 1.0
 *
 * Func:
 * Public  getAddressComponent 根据地址获取国家、省份、城市及周边数据
 * Private toCurl              使用curl调用百度Geocoding API
 */class Geocoding {
    // 百度Geocoding API
    const API = &#39;http://api.map.baidu.com/geocoder/v2/&#39;;    // 不显示周边数据
    const NO_POIS = 0;    // 显示周边数据
    const POIS = 1; 
    /**
     * 根据地址获取国家、省份、城市及周边数据
     * @param  String  $ak        百度ak(密钥)
     * @param  Decimal $longitude 经度
     * @param  Decimal $latitude  纬度
     * @param  Int     $pois      是否显示周边数据
     * @return Array
     */
    public static function getAddressComponent($ak, $longitude, $latitude, $pois=self::NO_POIS){
        $param = array(                &#39;ak&#39; => $ak,                &#39;location&#39; => implode(&#39;,&#39;, array($latitude, $longitude)),                &#39;pois&#39; => $pois,                &#39;output&#39; => &#39;json&#39;
        );        // 请求百度api
        $response = self::toCurl(self::API, $param);        $result = array();        if($response){            $result = json_decode($response, true);
        }        return $result;
    }    /**
     * 使用curl调用百度Geocoding API
     * @param  String $url    请求的地址
     * @param  Array  $param  请求的参数
     * @return JSON
     */
    private static function toCurl($url, $param=array()){
        $ch = curl_init();        if(substr($url,0,5)==&#39;https&#39;){
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 跳过证书检查
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, true);  // 从证书中检查SSL加密算法是否存在
        }
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($param));        $response = curl_exec($ch);        if($error=curl_error($ch)){            return false;
        }
        curl_close($ch);        return $response;
    }
}?>

##demo.php

<?phprequire "Geocoding.class.php";$ak = &#39;这里填写你的百度AK&#39;;$longitude = 113.327782;$latitude = 23.137202;$result = Geocoding::getAddressComponent($ak, $longitude, $latitude, Geocoding::NO_POIS);echo &#39;<pre class="brush:php;toolbar:false">&#39;;
print_r($result);echo &#39;

';?>

Example returns:

Array(
    [status] => 0
    [result] => Array
        (
            [location] => Array
                (
                    [lng] => 113.32778195925
                    [lat] => 23.137201991056
                )
            [formatted_address] => 广东省广州市天河区体育西横街35号
            [business] => 天河城,体育中心,沙河
            [addressComponent] => Array
                (
                    [city] => 广州市
                    [country] => 中国
                    [direction] => 附近
                    [distance] => 14
                    [district] => 天河区
                    [province] => 广东省
                    [street] => 体育西横街
                    [street_number] => 35号
                    [country_code] => 0
                )
            [poiRegions] => Array
                (
                )
            [sematic_description] => 红盾大厦北58米
            [cityCode] => 257
        )
)

This article explains how to obtain the country, province, city, and Peripheral data category, please pay attention to php Chinese website for more related content.

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