How to Create a Incremental Array to Make a Bulk Insert?

I need to do something like the example below but I do not know how to add the field to the array.

    $column_count = 0;
    foreach ($line as $column) {

        $array_line[$column_count] = $field_names[$column_count] => $column;
        $column_count++;
    }
    DB::table('table')->insert($array_line);

When I tried to execute like this:

    $column_count = 0;
    foreach ($line as $column) {

        $array_line[$column_count] = [$field_names[$column_count] => $column;]
        $column_count++;
    }
    DB::table('table')->insert($array_line);

I get an error that shows me how Laravel set up my query and it looks like this:

    INSERT INTO table (column1) VALUES (value_original_column_1), (value_original_column_2), (value_original_column_3);

When te correct way should be:

    INSERT INTO table (column1, colum2, column3) VALUES (value_original_column_1, value_original_column_2, value_original_column_3);

$column_count = 0;
$array_line =[];
$line = ['column1','column2'];
$field_names = [ 0 => "title",1=>"description"];
 foreach ($line as $column) {
   $array_line[$field_names[$column_count]] =   $column;
        $column_count++;
 }
\DB::table('post')->insert($array_line);