关于mkdir权限不够处理方法

if (!function_exists('uploadImg')) {
    //上传图片
    function uploadImg($url, $path = 'wx/fn/')
    {

        //$path = 'img/wechatapp/fn/';  路径

        if (!is_dir($path)){
            $oldumask = umask(0);
            mkdir($path, 0777,true);
            umask($oldumask);
        }
        //对照片处理
        $url = mb_substr($url, 0, -4);

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
        $file = curl_exec($ch);
        curl_close($ch);
        $filename = pathinfo($url, PATHINFO_BASENAME);
        $filename = strtolower($filename);
        $resource = fopen($path . $filename, 'a');
        fwrite($resource, $file);
        fclose($resource);


        $name = $path . $filename;

        return $name;
    }
}

if (!is_dir($path)){
    $oldumask = umask(0);
    mkdir($path, 0777,true);
    umask($oldumask);
}

这边做处理。