<?php
// 接口说明 http://www.8ru.org/weixin-js-sdk.html
namespace Home\Controller;
class Jssdk {
private $appId;
private $appSecret;
public function __construct($appId, $appSecret) {
$this->appId = $appId;
$this->appSecret = $appSecret;
}
public function getSignPackage() {
$jsapiTicket = $this->getJsApiTicket();
$url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
$timestamp = time();
$nonceStr = $this->createNonceStr();
// 这里参数的顺序要按照 key 值 ASCII 码升序排序
$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr×tamp=$timestamp&url=$url";
$signature = sha1($string);
$signPackage = array(
"appId" => $this->appId,
"nonceStr" => $nonceStr,
"timestamp" => $timestamp,
"url" => $url,
"signature" => $signature,
"rawString" => $string
);
return $signPackage;
}
private function createNonceStr($length = 16) {
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
private function getJsApiTicket() {
// jsapi_ticket 应该全局存储与更新,以下代码以写入到文件中做示例
if (isset($_SERVER['HTTP_APPNAME'])){ //SAE环境,需要开通memcache
$mem = memcache_init();
}else { //本地环境,需已安装memcache
$mem = new Memcache;
$mem->connect('localhost', 11211) or die ("Could not connect");
}
$ticket = $mem->get($this->appid);
if (!isset($ticket) || empty($ticket)) {
$accessToken = $this->getAccessToken();
$url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
$res = json_decode($this->httpGet($url));
$ticket = $res->ticket;
if ($ticket) {
$mem->set($this->appid, $ticket, 0, 7200);
}
} else {
$ticket = $mem->get($this->appid);
}
return $ticket;
}
private function getAccessToken() {
// access_token 应该全局存储与更新,以下代码以写入到文件中做示例
if (isset($_SERVER['HTTP_APPNAME'])){ //SAE环境,需要开通memcache
$mem = memcache_init();
}else { //本地环境,需已安装memcache
$mem = new Memcache;
$mem->connect('localhost', 11211) or die ("Could not connect");
}
$access_token = $mem->get($this->appSecret);
if (!isset($access_token) || empty($access_token)) {
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
$res = json_decode($this->httpGet($url));
$access_token = $res->access_token;
if ($access_token) {
$mem->set($this->appSecret, $access_token, 0, 3600);
}
} else {
$access_token = $mem->get($this->appSecret);
}
return $access_token;
}
private function httpGet($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_TIMEOUT, 500);
curl_setopt($curl, CURLOPT_URL, $url);
$res = curl_exec($curl);
curl_close($curl);
return $res;
}
}
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