Laravel 5.0 Error exception with message Undefined property

I'm having some problems with some SQL in Laravel in a controller.

Here's what i have :

public function getKeyword()
{
    $date = strftime("%Y-%m-%d");
    echo ($date);


    $keyword = DB::table('demo_question_keyword')
                ->select('keyword')
                ->orderBy('date_from', 'desc')
                ->having('date_from', '>=', $date)
                ->limit(1)
                ->get();

    echo ($keyword);
}

This prints the date correctly, but it seems like $keyword does not retrieve what i want correctly. I also tried to make it more simple, using $keyword = DB::select('select keyword from demo_question_keyword'); but i'm getting the same error.

I also tried with PDO in a different way :

$pdo_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION;
    $bdd = new PDO('localhost::3306;dbname=Agora', 'Adonis', 'Agoraroot', $pdo_options);

    $stmt = $bdd->prepare('SELECT keyword FROM demo_question_keyword ORDER BY id_question DESC LIMIT 1');
    $stmt->execute();
    $row = $stmt->fetch;

    echo $row['keyword'];

but again, same error.

This is the error i'm always getting :

local.ERROR: exception 'ErrorException' with message 'Undefined property: stdClass::$exactLocation'

And this is the line that the error is directing to :

$campaign->exact_location = $jsonBody->exactLocation;

But it seems weird to me because $exactLocation has nothing to do with what i'm doing in my controller.

Thank you for taking the time to try to help me.

via Chebli Mohamed