/*
 * 封住curl请求方法
 * @param { (string) $url }  请求的url
 * @param { (array) $post_data }  请求的参数
 * @param { (boolean) $ispost } post/get 默认post
 * @param {(boolean) $isJson}  是否发送json数据
 */
function send_request($url, $post_data = array(), $ispost = true,$isJson=false)
{
    if (empty($url) || empty($post_data)) {
        return false;
    }
    if($isJson)
    {
        $post_data=json_encode($post_data);
    }else
        $o = http_build_query($post_data);
    if (!$ispost) {
        $post_data =$o;
        if(!strpos($url,\'?\'))
            $url =trim($url . \'?\' . $post_data);
        else
        {
            $url =trim($url.$post_data);
        }

    }
    //初始化curl
    $ch = curl_init();
    curl_setopt($ch,CURLOPT_URL, $url);
    //设置header
    curl_setopt($ch, CURLOPT_HEADER, 0);
    //要求结果为字符串且输出到屏幕上
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    if ($ispost) {
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, 1);
        // $post_data为array类型时multipart/form­data请求，string类型时application/x-www-form-urlencoded
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
    }
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); //不验证证书下同
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    $data = curl_exec($ch);//运行curl
    curl_close($ch);
    return $data;

}

/*得到微信accessToken并写入文件*/
function writeAccessToken($appid,$secret){
    $url =\'https://api.weixin.qq.com/cgi-bin/token\';
    $res = send_request($url,array(\'grant_type\'=>\'client_credential\',\'appid\'=>$appid,\'secret\'=>$secret),false);
    $res = json_decode($res,1);
    if(isset($res[\'errcode\'])) throw new Exception($res[\'errmsg\']);
    file_put_contents(\'token.php\',\'<?php exit;?>\'.$res[\'access_token\'].\',\'.time());
    return $res[\'access_token\'];
}
/*得到微信accessToken*/
	function getAccessToken(){
        $file=\'\';
        if(file_exists(\'token.php\'))
            $file=file_get_contents(\'token.php\');
        if($file!=\'\')
        {
            $content=str_replace(\'<?php exit;?>\',\'\',$file);
            $arr=explode(\',\',$content);
            if(time()-$arr[1]>3000)
            {
                return writeAccessToken(\'wx5f0163b88\',\'a003ed7f659e\');
            }
            return $arr[0];

        }else
        {
            return  writeAccessToken(\'wx5f01641a\',\'a003edcc043bb059e\');
        }

    }

/*生成二维码*/

function generrate()
{
    $qrcode_url = \'https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=\'.getAccessToken();
    $post_data = array();
    $post_data[\'expire_seconds\'] = 3600 * 24; //有效时间
    $post_data[\'action_name\'] = \'QR_SCENE\';
    $post_data[\'action_info\'][\'scene\'][\'scene_id\'] = 123; //可以用户uid，微信端可获取，用户推广使用
    $json =json_decode(send_request($qrcode_url, $post_data,true,true),true);
  // echo var_dump($json);
    if (!$json[\'errcode\']) {

        $ticket = $json[\'ticket\'];
        echo  \'<img src=\\'https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=\' . urlencode($ticket).\'\\' width=\\'260\\' height=\\'260\\'/>\';
    } else {
        echo \'发生错误：错误代码 \' . $json[\'errcode\'] . \'，微信返回错误信息：\' . $json[\'errmsg\'];
        exit;
    }
}

 /*处理推送事件*/
    function reponseMsg()
    {
        $content=file_get_contents("php://input");
        if(!empty($content))
        {
        $postObj = simplexml_load_string($content, \'SimpleXMLElement\', LIBXML_NOCDATA);
         file_put_contents(\'log.txt\',date(\'Y-m-d H:i:s\').\'\n\'.$content);
            $openid = $postObj->FromUserName; //用户openid
            $Event=strtolower($postObj->Event);
         /*当等于subscribe为已关注用户*/
            if ($Event == \'subscribe\') {//首次关注
                $is_first = 0;
            } elseif ($Event == \'scan\') {//已关注
                $is_first = 1;
            }

        }
        else
            {
                file_put_contents(\'log.txt\',date(\'Y-m-d H:i:s\').\'\n无法获取到内容\');
                exit;
            }
    }
   /*处理微信推送过的信息：注意只有当用户点击关注公众号了或者已经关注了才会推送信息*/
     $signature=$_GET[\'signature\'];
	if($signature!=\'\')
	{
	    $getInfo=getSHA1(\'NfzAVfnFD1fv63f4xVtVRNFtRmF1RyRT\',$_GET[\'timestamp\'],$_GET[\'nonce\']);
        $echostr=$_GET[\'echostr\'];
        if($getInfo[1]!= $signature)
        {
            echo \'签名失败\';
            exit;
        }
        if( $echostr){
            //第一次接入weixin api接口的时候
            echo  $echostr;
            exit;
        }else{
            //echo \'adss\';
            reponseMsg();
        }

    }