php获取小程序二维码

public function getWxcode($store_me, $user_me, $url,$status=1,$type=1){
   
    $ACCESS_TOKEN = $this->getWxAccessToken();
    $url_token = "https://api.weixin.qq.com/wxa/getwxacode?access_token=".$ACCESS_TOKEN['access_token'];
    $post_data = array(
        'path' => ''
    );        
    $post_data = json_encode($post_data);
    $data_send = $this->send_post($url_token,$post_data);//返回的数据为二进制数据流
}
public function getWxAccessToken(){
    $appid = '';
    $appsecret = '';
    if($_SESSION['access_token_'.$appid] && $_SESSION['expire_time_'.$appid]>time()){
        return $_SESSION['access_token_'.$appid];
    }else{
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;
        $access_token = $this->makeRequest($url);
        $access_token = json_decode($access_token['result'],true);
        $_SESSION['access_token_'.$appid][$access_token];
        $_SESSION['expire_time_'.$appid][time()+7000];
        return $access_token;
    }
}
/**
 * 发起http请求
 * @param string $url 访问路径
 * @param array $params 参数，该数组多于1个，表示为POST
 * @param int $expire 请求超时时间
 * @param array $extend 请求伪造包头参数
 * @param string $hostIp HOST的地址
 * @return array    返回的为一个请求状态，一个内容
 */
public function makeRequest($url, $params = array(), $expire = 0, $extend = array(), $hostIp = '')
{
    if (empty($url)) {
        return array('code' => '100');
    }

    $_curl = curl_init();
    $_header = array(
        'Accept-Language: zh-CN',
        'Connection: Keep-Alive',
        'Cache-Control: no-cache'
    );
    // 方便直接访问要设置host的地址
    if (!empty($hostIp)) {
        $urlInfo = parse_url($url);
        if (empty($urlInfo['host'])) {
            $urlInfo['host'] = substr(DOMAIN, 7, -1);
            $url = "http://{$hostIp}{$url}";
        } else {
            $url = str_replace($urlInfo['host'], $hostIp, $url);
        }
        $_header[] = "Host: {$urlInfo['host']}";
    }
    // 只要第二个参数传了值之后，就是POST的
    if (!empty($params)) {
        curl_setopt($_curl, CURLOPT_POSTFIELDS, http_build_query($params));
        curl_setopt($_curl, CURLOPT_POST, true);
    }
    if (substr($url, 0, 8) == 'https://') {
        curl_setopt($_curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($_curl, CURLOPT_SSL_VERIFYHOST, FALSE);
    }
    curl_setopt($_curl, CURLOPT_URL, $url);
    curl_setopt($_curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($_curl, CURLOPT_USERAGENT, 'API PHP CURL');
    curl_setopt($_curl, CURLOPT_HTTPHEADER, $_header);
    if ($expire > 0) {
        curl_setopt($_curl, CURLOPT_TIMEOUT, $expire); // 处理超时时间
        curl_setopt($_curl, CURLOPT_CONNECTTIMEOUT, $expire); // 建立连接超时时间
    }
    // 额外的配置
    if (!empty($extend)) {
        curl_setopt_array($_curl, $extend);
    }
    $result['result'] = curl_exec($_curl);
    $result['code'] = curl_getinfo($_curl, CURLINFO_HTTP_CODE);
    $result['info'] = curl_getinfo($_curl);
    if ($result['result'] === false) {
        $result['result'] = curl_error($_curl);
        $result['code'] = -curl_errno($_curl);
    }
    curl_close($_curl);
    return $result;
}
/**
 * 消息推送http
 * @param $url_token
 * @param $post_data
 * @return bool|string
 */
protected function send_post($url_token, $post_data) {
    $options = array(
        'http' => array(
            'method'  => 'POST',
            'header'  => 'Content-type:application/json',
            //header 需要设置为 JSON
            'content' => $post_data,
            'timeout' => 60
            //超时时间
        )
    );
    $context = stream_context_create($options);
    $result = file_get_contents($url_token, false, $context);       
    return $result;
}