PHP: eval don't have value - laravel

Question

I stored a Controller#Action in the database, but when I try to run it it don't has value.
I know that eval is very dangerous. If there is an alternative what I can use in this situation I'm open for it.
My code where I wan't to run it:
//$action = "ExchangeController::module_getAllValutaByBank";
//$params = "K&H";
$test = eval('\App\Http\Controllers\ModuleControllers' . "\\" . $action . "('" . $params . "');");
Debugbar::info($test);
The code what I want to eval:
It's an API request to the local ForexChange site. #param bank's name
#return stuctured string
public static function module_getAllValutaByBank($bankName){
$return = '';
$data['bankName'] = $bankName;
$response = self::getRequest($data);
if(is_array($response)){
$return .= $response[0]['bank'] . "\n";
foreach($response as $key => $item){
$return .= $item['valuta'] . " - " . round($item['buy'], 2) . " - " . round($item['sell'], 2) . "\n";
}
} else {
$return = $response;
}
Debugbar::info($return);
return $return;
}
Output of Debugbar::info($return);
K&H Bank GBP - 338.51 - 363.07 AUD - 189.9 - 207.8 DKK - 39.75 - 43.93
JPY - 2.26 - 2.48 CAD - 188.73 - 206.51 NOK - 30.92 - 34.18 CHF -
256.89 - 275.53 SEK - 29.18 - 32.26 USD - 246.14 - 260.32 CZK - 11.51 - 12.97 PLN - 69.87 - 78.79 EUR - 302.92 - 320.38 HRK - 39.39 - 44.41
Output of Debugbar::info($test);
null
Where it went wrong?
EDIT:
Found the solution:
$test = call_user_func('\App\Http\Controllers\ModuleControllers' . "\\" . $action, $params));

Answer 1

Found the solution:
$test = call_user_func('\App\Http\Controllers\ModuleControllers' . "\\" . $action, $params));