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微信最新JSAPI调用方法

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先引入微信官方类:

<?php
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=$nonceStr&timestamp=$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
    $data = json_decode(file_get_contents("jsapi_ticket.json"));
    if ($data->expire_time < time()) {
      $accessToken = $this->getAccessToken();
      $url = "http://api.weixin.qq.com/cgi-bin/ticket/getticket?type=1&access_token=$accessToken";
      $res = json_decode($this->httpGet($url));
      $ticket = $res->ticket;
      if ($ticket) {
        $data->expire_time = time() + 7000;
        $data->jsapi_ticket = $ticket;
        $fp = fopen("jsapi_ticket.json", "w");
        fwrite($fp, json_encode($data));
        fclose($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
    $data = json_decode(file_get_contents("access_token.json"));
    if ($data->expire_time < time()) {
      $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$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;
        $fp = fopen("access_token.json", "w");
        fwrite($fp, json_encode($data));
        fclose($fp);
      }
    } else {
      $access_token = $data->access_token;
    }
    return $access_token;
  }

  private function httpGet($url) {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, 500);
    curl_setopt($curl, CURLOPT_URL, $url);

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

    return $res;
  }
}

在控制文件,添加下面两行代码:

//微信JSAPI
$jssdk = new JSSDK(WX_APPID, WX_APPSECRET);
$signPackage = $jssdk->GetSignPackage();

模版文件,这样写:

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script>
  wx.config({
    //debug: true,
    appId: '<?php echo $signPackage["appId"];?>',
    timestamp: <?php echo $signPackage["timestamp"];?>,
    nonceStr: '<?php echo $signPackage["nonceStr"];?>',
    signature: '<?php echo $signPackage["signature"];?>',
    jsApiList: ['hideOptionMenu','onMenuShareAppMessage','onMenuShareTimeline']
  });
  wx.ready(function () {
    //wx.hideOptionMenu();
    //分享给朋友
	wx.onMenuShareAppMessage({
      title: '{$info[share_title]}',
      desc: '{$info[share_desc]}',
      link: '{$info[share_url]}',
      imgUrl: '{$info[share_logo]}',
      trigger: function (res) {
        //alert('用户点击发送给朋友');
      },
      success: function (res) {
        //alert('已分享');
      },
      cancel: function (res) {
        //alert('已取消');
      },
      fail: function (res) {
        alert(JSON.stringify(res));
      }
    });
    //分享到朋友圈
    wx.onMenuShareTimeline({
      title: '{$info[share_title]}',
      link: '{$info[share_url]}',
      imgUrl: '{$info[share_logo]}',
      trigger: function (res) {
        //alert('');
      },
      success: function (res) {
        //alert('');
      },
      cancel: function (res) {
        //alert('');
      },
      fail: function (res) {
        alert(JSON.stringify(res));
      }
    });
	
  });
</script>

最后,附微信官方demo页和示例代码:

http://demo.open.weixin.qq.com/jssdk

http://demo.open.weixin.qq.com/jssdk/sample.zip

需要说明的是,必须微信6.0.2及以上才有效果!

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