Swoole\Image::readfile PHP Method

    static function readfile($pic)
    {
        $image_info = getimagesize($pic);
        if ($image_info["mime"] == "image/jpeg" || $image_info["mime"] == "image/gif" || $image_info["mime"] == "image/png") {
            switch ($image_info["mime"]) {
                case "image/jpeg":
                    $im = imagecreatefromjpeg($pic);
                    break;
                case "image/gif":
                    $im = imagecreatefromgif($pic);
                    break;
                case "image/png":
                    $im = imagecreatefrompng($pic);
                    break;
            }
            return $im;
        }
        return false;
    }