Detailed explanation of the example code for configuring WeChat jssdk in one PHP file

^ajax(Common.ServerUrl + "GetWX.php", {

 data: {

  Type: "config",

  url: location.href.split('#')[0]

 },

 dataType: 'json',

 type: 'get',

 timeout: 5000,

 success: function(data) {

  wx.config({

   debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。

   appId: '……', // 必填，公众号的唯一标识

   timestamp: data.timestamp, // 必填，生成签名的时间戳

   nonceStr: data.nonceStr, // 必填，生成签名的随机串

   signature: data.signature, // 必填，签名，见附录1

   jsApiList: ["getLocation"] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2

  });

 }

})

wx.ready(function() {

 wx.getLocation({

  type: 'wgs84', // 默认为wgs84的gps坐标，如果要返回直接给openLocation用的火星坐标，可传入'gcj02'

  success: function(res) {

   var latitude = res.latitude; // 纬度，浮点数，范围为90 ~ -90

   var longitude = res.longitude; // 经度，浮点数，范围为180 ~ -180。

   plus2.storage.setItem("latitude", latitude);

   plus2.storage.setItem("longitude", longitude);

  }

 });

});

<?php

 include "lib/Cache.php";

 define($APPID, "……");

 define($SECRET, "……")

 if($_GET['Type'] == "access_token"){

//  echo getAccess_token();

 }

 else if($_GET['Type'] == "jsapi_ticket"){

//  echo getJsapi_ticket();

 }

 else if($_GET['Type'] == "config"){

  $jsapi_ticket = getJsapi_ticket();

  $nonceStr = "x".rand(10000,100000)."x"; //随机字符串

  $timestamp = time(); //时间戳

  $url = $_GET['url'];

  $signature = getSignature($jsapi_ticket,$nonceStr, $timestamp, $url);

  $result = array("jsapi_ticket"=>$jsapi_ticket, "nonceStr"=>$nonceStr,"timestamp"=>$timestamp,"url"=>$url,"signature"=>$signature);

  echo json_encode($result);

 }

 function getSignature($jsapi_ticket,$noncestr, $timestamp, $url){

  $string1 = "jsapi_ticket=".$jsapi_ticket."&noncestr=".$noncestr."&timestamp=".$timestamp."&url=".$url;

  $sha1 = sha1($string1);

  return $sha1;

 }

 function getJsapi_ticket(){

  $cache = new Cache();

  $cache = new Cache(7000, 'cache/'); //需要创建cache文件夹存储缓存文件。

  //从缓存从读取键值 $key 的数据

  $jsapi_ticket = $cache -> get("jsapi_ticket");

  $access_token = getAccess_token();

  //如果没有缓存数据

  if ($jsapi_ticket == false) {

   $access_token = getAccess_token();

   $url = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket';

   $data = array('type'=>'jsapi','access_token'=>$access_token);

   $header = array();

   $response = json_decode(curl_https($url, $data, $header, 5));

   $jsapi_ticket = $response->ticket;

   //写入键值 $key 的数据

   $cache -> put("jsapi_ticket", $jsapi_ticket);

  }

  return $jsapi_ticket;

 }

 function getAccess_token(){

  $cache = new Cache();

  $cache = new Cache(7000, 'cache/');

  //从缓存从读取键值 $key 的数据

  $access_token = $cache -> get("access_token");

  //如果没有缓存数据

  if ($access_token == false) {

   $url = 'https://api.weixin.qq.com/cgi-bin/token';

   $data = array('grant_type'=>'client_credential','appid'=>$APPID,'secret'=>$SECRET);

   $header = array();

   $response = json_decode(curl_https($url, $data, $header, 5));

   $access_token = $response->access_token;

   //写入键值 $key 的数据

   $cache -> put("access_token", $access_token);

  }

  return $access_token;

 }

 /** curl 获取 https 请求

 * @param String $url 请求的url

 * @param Array $data 要發送的數據

 * @param Array $header 请求时发送的header

 * @param int $timeout 超时时间，默认30s

 */

 function curl_https($url, $data=array(), $header=array(), $timeout=30){

  $ch = curl_init();

  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 跳过证书检查

  curl_setopt($ch, CURLOPT_URL, $url);

  curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

  curl_setopt($ch, CURLOPT_POST, true);

  curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));

  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

  curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);

  $response = curl_exec($ch);

  if($error=curl_error($ch)){

  die($error);

  }

  curl_close($ch);

  return $response;

 }

?>

<?php

class Cache {

 private $cache_path;

 //path for the cache

 private $cache_expire;

 //seconds that the cache expires

 //cache constructor, optional expiring time and cache path

 public function Cache($exp_time = 3600, $path = "cache/") {

  $this -> cache_expire = $exp_time;

  $this -> cache_path = $path;

 }

 //returns the filename for the cache

 private function fileName($key) {

  return $this -> cache_path . md5($key);

 }

 //creates new cache files with the given data, $key== name of the cache, data the info/values to store

 public function put($key, $data) {

  $values = serialize($data);

  $filename = $this -> fileName($key);

  $file = fopen($filename, 'w');

  if ($file) {//able to create the file

   fwrite($file, $values);

   fclose($file);

  } else

   return false;

 }

 //returns cache for the given key

 public function get($key) {

  $filename = $this -> fileName($key);

  if (!file_exists($filename) || !is_readable($filename)) {//can't read the cache

   return false;

  }

  if (time() < (filemtime($filename) + $this -> cache_expire)) {//cache for the key not expired

   $file = fopen($filename, "r");

   // read data file

   if ($file) {//able to open the file

    $data = fread($file, filesize($filename));

    fclose($file);

    return unserialize($data);

    //return the values

   } else

    return false;

  } else

   return false;

  //was expired you need to create new

 }

}

?>