最近在做一个手机端的webapp地图应用，而核心内容当然是定位了，但是定位的话有几种方式，IP定位,GPS定位，基站定位（这个貌似webapp用不了）， 那么剩下核心的gps定位和ip定位了，我们知道，html5有定位API，但是该API拿到的GPS数据是硬件坐标，无法直接显示在地图上。 后来上百度LBS云看到有地图IP定位API和GPS坐标转换API，地址：http://developer.baidu.com/map/ 百度地图API的调用需要申请KEY，这里就不具体介绍了，直接贴上本人写了两个关键方法，为了方便前台调用，返回数据采用以下格式
{ address: "北京市海淀区西二旗北路", province: "北京市", city: "北京市", street: "西二旗北路", street_number: "", city_code: 131, lng: 116.3207676804, lat: 40.064084055578}<?php /** * @author xialei <xialeistudio@gmail.com> */class map{ private static $_instance; const REQ_GET = 1; const REQ_POST = 2; /** * 单例模式 * @return map */ public static function instance() { if (!self::$_instance instanceof self) { self::$_instance = new self; } return self::$_instance; } /** * 执行CURL请求 * @author: xialei<xialeistudio@gmail.com> * @param $url * @param array $params * @param bool $encode * @param int $method * @return mixed */ private function async($url, $params = array(), $encode = true, $method = self::REQ_GET) { $ch = curl_init(); if ($method == self::REQ_GET) { $url = $url . '?' . http_build_query($params); $url = $encode ? $url : urldecode($url); curl_setopt($ch, CURLOPT_URL, $url); } else { curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_POSTFIELDS, $params); } curl_setopt($ch, CURLOPT_REFERER, '百度地图referer'); curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X; en-us) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53'); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $resp = curl_exec($ch); curl_close($ch); return $resp; } /** * ip定位 * @param string $ip * @return array * @throws Exception */ public function locationByIP($ip) { //检查是否合法IP if (!filter_var($ip, FILTER_VALIDATE_IP)) { throw new Exception('ip地址不合法'); } $params = array( 'ak' => '百度地图API KEY', 'ip' => $ip, 'coor' => 'bd09ll'//百度地图GPS坐标 ); $api = 'http://api.map.baidu.com/location/ip'; $resp = $this->async($api, $params); $data = json_decode($resp, true); //有错误 if ($data['status'] != 0) { throw new Exception($data['message']); } //返回地址信息 return array( 'address' => $data['content']['address'], 'province' => $data['content']['address_detail']['province'], 'city' => $data['content']['address_detail']['city'], 'district' => $data['content']['address_detail']['district'], 'street' => $data['content']['address_detail']['street'], 'street_number' => $data['content']['address_detail']['street_number'], 'city_code' => $data['content']['address_detail']['city_code'], 'lng' => $data['content']['point']['x'], 'lat' => $data['content']['point']['y'] ); } /** * GPS定位 * @param $lng * @param $lat * @return array * @throws Exception */ public function locationByGPS($lng, $lat) { $params = array( 'coordtype' => 'wgs84ll', 'location' => $lat . ',' . $lng, 'ak' => '百度地图API KEY', 'output' => 'json', 'pois' => 0 ); $resp = $this->async('http://api.map.baidu.com/geocoder/v2/', $params, false); $data = json_decode($resp, true); if ($data['status'] != 0) { throw new Exception($data['message']); } return array( 'address' => $data['result']['formatted_address'], 'province' => $data['result']['addressComponent']['province'], 'city' => $data['result']['addressComponent']['city'], 'street' => $data['result']['addressComponent']['street'], 'street_number' => $data['result']['addressComponent']['street_number'], 'city_code'=>$data['result']['cityCode'], 'lng'=>$data['result']['location']['lng'], 'lat'=>$data['result']['location']['lat'] ); }}调用方法就不说了。稍微看一下源代码就可以知道的
