摘要：為了避免大家少走彎路，這里先介紹下硬性條件必須是通過(guò)認(rèn)證的微信服務(wù)號(hào)或者微信企業(yè)號(hào)才具有此功能。有自己的云虛擬主機(jī)，也就是自己的網(wǎng)站。如果在部署過(guò)程中代碼在此處驗(yàn)證失敗，請(qǐng)到下載新的證書判別文件。調(diào)通后，就可以出現(xiàn)下面的這個(gè)界面了

為了避免大家少走彎路，這里先介紹下硬性條件
1、必須是通過(guò)認(rèn)證的微信服務(wù)號(hào)或者微信企業(yè)號(hào)才具有此功能。
2、有自己的云虛擬主機(jī)，也就是自己的網(wǎng)站。
開始配置：

一、公眾號(hào)號(hào)的設(shè)置
1、進(jìn)入微信公眾平臺(tái)后臺(tái)，在公眾號(hào)設(shè)置->功能設(shè)置界面下配置好JS接口安全域名，如下圖

2、在基本配置里面完成IP白名單和服務(wù)器的配置，這步很重要，如下圖

二、網(wǎng)站代碼結(jié)構(gòu)如下

weixin--|
        |---access_token.php
        |---airkiss.php                        //公眾號(hào)鏈接到該文件
        |---jsapi_ticket.php
        |---jssdk.php
        |---MP_verify_yfiF3OWtLI4GfhBg.txt    //JS接口驗(yàn)證文件,在設(shè)置JS接口時(shí)下載后放到網(wǎng)站的，名稱隨機(jī)

三、代碼詳情
1、access_token.php

{"access_token":"","expire_time":0}

2、airkiss.php

GetSignPackage();
?>



  
  

3、jsapi_ticket.php

{"jsapi_ticket":"","expire_time":0}

4、jssdk.php

appId = $appId;
    $this->appSecret = $appSecret;
  }

  public function getSignPackage() {
    $jsapiTicket = $this->getJsApiTicket();

    // 注意 URL 一定要?jiǎng)討B(tài)獲取，不能 hardcode.
    $protocol = (!empty($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] !== "off" || $_SERVER["SERVER_PORT"] == 443) ? "https://" : "http://";
    $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

    $timestamp = time();
    $nonceStr = $this->createNonceStr();

    // 這里參數(shù)的順序要按照 key 值 ASCII 碼升序排序
    $string = "jsapi_ticket=$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 應(yīng)該全局存儲(chǔ)與更新，以下代碼以寫入到文件中做示例
    $data = json_decode($this->get_php_file("jsapi_ticket.php"));
    if ($data->expire_time < time()) {
      $accessToken = $this->getAccessToken();
      // 如果是企業(yè)號(hào)用以下 URL 獲取 ticket
      // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
      $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
      $res = json_decode($this->httpGet($url));
      $ticket = $res->ticket;
      if ($ticket) {
        $data->expire_time = time() + 7000;
        $data->jsapi_ticket = $ticket;
        $this->set_php_file("jsapi_ticket.php", json_encode($data));
      }
    } else {
      $ticket = $data->jsapi_ticket;
    }

    return $ticket;
  }

  private function getAccessToken() {
    // access_token 應(yīng)該全局存儲(chǔ)與更新，以下代碼以寫入到文件中做示例
    $data = json_decode($this->get_php_file("access_token.php"));
    if ($data->expire_time < time()) {
      // 如果是企業(yè)號(hào)用以下URL獲取access_token
      // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";
      $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
      $res = json_decode($this->httpGet($url));
      $access_token = $res->access_token;
      if ($access_token) {
        $data->expire_time = time() + 7000;
        $data->access_token = $access_token;
        $this->set_php_file("access_token.php", json_encode($data));
      }
    } else {
      $access_token = $data->access_token;
    }
    return $access_token;
  }

  private function httpGet($url) {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, 500);
    // 為保證第三方服務(wù)器與微信服務(wù)器之間數(shù)據(jù)傳輸?shù)陌踩裕形⑿沤涌诓捎胔ttps方式調(diào)用，必須使用下面2行代碼打開ssl安全校驗(yàn)。
    // 如果在部署過(guò)程中代碼在此處驗(yàn)證失敗，請(qǐng)到 http://curl.haxx.se/ca/cacert.pem 下載新的證書判別文件。
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);
    curl_setopt($curl, CURLOPT_URL, $url);

    $res = curl_exec($curl);
    curl_close($curl);

    return $res;
  }

  private function get_php_file($filename) {
    return trim(substr(file_get_contents($filename), 15));
  }
  private function set_php_file($filename, $content) {
    $fp = fopen($filename, "w");
    fwrite($fp, "" . $content);
    fclose($fp);
  }
}

調(diào)通后，就可以出現(xiàn)下面的這個(gè)界面了