[DivMan]

вот так должно быть?

$questions = [
    1 => [
        'question' => 'Сколько будет 2+2?',
        'variant1' => '2', 
        'variant2' => '4',
        'variant3' => '6',
        'answer1' => '1',
        'answer2' => '2',
              
    ],