Argument 1 passed to UAParser\Parser::parse() must be of the type string, null given in laravel stats tracker - laravel

Question

I installed this package but when I running php artisan migrate, I see this error:
In Parser.php line 35:
Argument 1 passed to UAParser\Parser::parse() must be of the type
string, null given, called in...
my code in config/database.php:
'tracker' => [
'driver' => 'tracker',
'host' => env('DB_HOST', '127.0.0.1'),
'database' => env('DB_DATABASE', 'forge'),
'strict' => false, // to avoid problems on some MySQL installs
],
what is the problem?
I think the above code must be wrong.

Answer 1

There is an issue in the package that needs fixing to be able to work. A quick workaround would be to set the user_agent manually by php if absent:
You can add the following at the beginning of your public\index.php temporarily:
if (!isset($_SERVER['HTTP_USER_AGENT']))
ini_set('user_agent', 'Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3');

Answer 2

I think there is an issue in the package that needs fixing to be able to work. The error occurs when composer dump-autoload runs.
So I edited the pragmarx\tracker\src\Support\UserAgentParser.php and edit the construct method.
Here is my code:
public function __construct($basePath, $userAgent = null)
{
$userAgent = $_SERVER['HTTP_USER_AGENT'];
if (!$userAgent && isset($_SERVER['HTTP_USER_AGENT'])) {
$userAgent = $_SERVER['HTTP_USER_AGENT'];
}
$this->parser = Parser::create()->parse($userAgent);
$this->userAgent = $this->parser->ua;
$this->operatingSystem = $this->parser->os;
$this->device = $this->parser->device;
$this->basePath = $basePath;
$this->originalUserAgent = $this->parser->originalUserAgent;
}
After that, I run composer dump-autoload my self.
NOTE: Of course when you run composer update or composer install this error occur again

Answer 3

Search for this file pragmarx\tracker\src\Support\UserAgentParser.php and add the line below at the start of construct method.
$userAgent = $_SERVER['HTTP_USER_AGENT'];