Sniffer::image(): string

182    public function image()183    {184        if (substr($this->file->body, 0, 6) === 'GIF87a'185            || substr($this->file->body, 0, 6) === 'GIF89a') {186            return 'image/gif';187        } elseif (substr($this->file->body, 0, 8) === "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A") {188            return 'image/png';189        } elseif (substr($this->file->body, 0, 3) === "\xFF\xD8\xFF") {190            return 'image/jpeg';191        } elseif (substr($this->file->body, 0, 2) === "\x42\x4D") {192            return 'image/bmp';193        } elseif (substr($this->file->body, 0, 4) === "\x00\x00\x01\x00") {194            return 'image/vnd.microsoft.icon';195        }196 197        return false;198    }