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如今微信公众平台非常多娱乐的，都实用到周边搜索功能，研究下比較简单，通过百度周边搜索接口封装例如以下：

调用格式：

$wechatBaiduAPI = new WechatBaiduAPI();

$ret = $wechatBaiduAPI->Place_search($str_key,$location['x'].",".$location['y'] );

參数说明：

$query：搜素关键词

$location： 地理位置经纬度

$radius： 搜索半径

<?php

	class WechatBaiduAPI{

		private $api_server_url;

		private $auth_params;

		public function __construct()

		{

			$this->api_server_url = "http://api.map.baidu.com/place/v2/";

			$this->auth_params = array();

			$this->auth_params['ak'] = "11ffd27d38deda622f51c9d314d46b1";

		}

		//http://api.map.baidu.com/place/search?

&query=眼镜&location=39.915,116.404&radius=3000&output=json&key=37492c0ee6f924cb5e934fa08c6b1676

		public function Place_search($query, $location, $radius=3000)

		{

			return $this->call("search", array("output" =>json, "query" => $query,"page_size" =>10, "page_num" => 0,

					 "scope" => 2,"location" => $location, "radius" => $radius));

		}

		protected function call($method, $params = array())

		{

			$params = array_merge($this->auth_params, $params);

			$url = $this->api_server_url . "$method?".http_build_query($params);

			$ch = curl_init();

			curl_setopt($ch, CURLOPT_URL, $url);

			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

			$data = curl_exec($ch);

			curl_close($ch);

			$result = null;

			$result = json_decode($data,true);

			return $result;

		}

	}

注意：代码里面的ak，是百度密钥。每一个百度帐号都有一个唯一的ak，详细自己能够百度！

$this->auth_params['ak'] = "11ffd27d38deda622f51c9d314d46b1";