后台：

public function share(){    $appId = C("WX_APPID"); //appid    $appSecret = C("WX_APPSECRET");// 秘钥    $curl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appId}&secret={$appSecret}";    $ch = curl_init();    curl_setopt($ch, CURLOPT_TIMEOUT, 5);    curl_setopt($ch, CURLOPT_URL, $curl);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);    $res = curl_exec($ch);// 获得token    curl_close($ch);    $ress = json_decode($res,True);    $token = $ress['access_token'];// 取出  至于存储代码就不列举了    $jsurl = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=".$token."&type=jsapi";    $ch = curl_init();    curl_setopt($ch, CURLOPT_TIMEOUT, 5);    curl_setopt($ch, CURLOPT_URL, $jsurl);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);    //$res = file_get_contents($curl);// 获得token    $js = curl_exec($ch);// 获得token    curl_close($ch);    $jss = json_decode($js,True);    $jsapi_ticket = $jss['ticket'];//   取出JS凭证, 至于存储代码就不列举了    $dataa['noncestr'] =  'sjijfdif'; //随意字符串 一会要传到JS里去.要求一致    $dataa['jsapi_ticket'] = $jsapi_ticket;    $dataa['timestamp'] = time();    $dataa['url'] = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];//动态获取URL    ksort($dataa);    $signature = '';    foreach($dataa as $k => $v){        $signature .= $k.'='.$v.'&';    }    $signature = substr($signature, 0, strlen($signature)-1);    $signature = sha1($signature);// 必填，签名，见附录1    $this->assign(array(        "appId"=>$appId,        "timestamp"=>$dataa['timestamp'],        "nonceStr"=>$dataa['noncestr'],        "signature"=>$signature,    ));    $this->display();}

前台：