我是 Laravel 初学者，谁能告诉我如何将数组插入数据库？

这些是我想插入到数据库中的值：

  $name4 = $request['name4'];
  $email4 = $request['email4'];
  $phone = $request['phone'];
  $cat = $request['cat'];
  $rname = $request['rname'];
  $file = $request['file'];
  $ingr = $request['ingr'];
  $qty = $request['qty'];
  $unit = $request['unit'];
  $recp = $request['recp'];
  $items = array(
    'ingredients'  => $ingr,
    'quantity' => $qty,
    'unit'     => $unit
  );

插入查询如下：

DB::INSERT("insert into tbl_contest (name, email, phone, category, recp_name, file, ingredient, recp_desc)" . "values('$name4','$email4','$phone','$cat','$rname','$file','$items','$recp')");

我想添加$ingr,$qty并添加$unit到列中ingredient。

谁能帮我？

提前致谢