//original
$dotted = [
    'user.name' => 'foo',
    'user.occupation' => 'bar',
];
 
// Converts it back to the original form
Arr::undot($dotted);

// Results in...
$resultArray = [
    'user' => [
        'name' => 'foo',
        'occupation' => 'bar',
    ]
];