php 实现微信 sdk 分享接口之法

<?php

class Wxsdk

{

private $appId;

private $appSecret;

/*

* 这里为威狮码的公众号的openid和appsecret,如果配置到其他的子商家会出现需要关注威狮码公众号,

* 则需要获取数据库的vender表里面的openid和appsecret

* */

public function __construct($appId = &#39;自己的appid&#39;, $appSecret = &#39;自己的appSecret&#39;)

{

$this->appId = $appId;

$this->appSecret = $appSecret;

}

public function getSignPackage(Request $request)

{

//接收到前端的转义url转义回来

$url = $_POST;

$durl = $url[&#39;url&#39;];

$durl = urldecode($durl);

$jsapiTicket = $this->getJsApiTicket();

$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=$nonceStr&timestamp=$timestamp&url=$durl";

$signature = sha1($string);

$signPackage = [

"appId" => $this->appId,

"nonceStr" => $nonceStr,

"timestamp" => $timestamp,

"url" => $url,

"signature" => $signature,

"rawString" => $string

];

//        var_dump($signPackage);die;

throw new SuccessMessage([&#39;msg&#39; => $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

$data = json_decode(file_get_contents("jssdk/jsapi_ticket.json"));

if ($data->expire_time < time()) {

$accessToken = $this->getAccessToken();

//定义传递的参数数组

$params[&#39;type&#39;] = &#39;jsapi&#39;;

$params[&#39;access_token&#39;] = $accessToken;

$url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" . $params[&#39;access_token&#39;] . "&type=" . $params[&#39;type&#39;] . "";

$res = json_decode(curl_get($url, $params));

$ticket = isset($res->ticket) ? $res->ticket : NULL;

if ($ticket) {

$res->expire_time = time() + 7000;

$res->jsapi_ticket = $ticket;

$fp = fopen("jssdk/jsapi_ticket.json", "w");

fwrite($fp, json_encode($res));

fclose($fp);

}

} else {

$ticket = $data->jsapi_ticket;

}

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

$data = json_decode(file_get_contents("jssdk/access_token.json"));

if ($data->expire_time < time()) {

//定义传递的参数数组

$params[&#39;grant_type&#39;] = &#39;client_credential&#39;;

$params[&#39;appid&#39;] = $this->appId;

$params[&#39;secret&#39;] = $this->appSecret;

$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=" . $params[&#39;grant_type&#39;] . "&appid=" . $params[&#39;appid&#39;] . "&secret=" . $params[&#39;secret&#39;] . "";

$res = json_decode(curl_post($url, $params));

$access_token = isset($res->access_token) ? $res->access_token : NULL;

if ($access_token) {

$res->expire_time = time() + 7000;

$res->access_token = $access_token;

$fp = fopen("jssdk/access_token.json", "w");

fwrite($fp, json_encode($res));

fclose($fp);

}

} else {

$access_token = $data->access_token;

}

return $access_token;

}

前端代码