Transform dot-noted strings with Laravel's `undot()` method

Laravel devs, here's a gem for you: πŸ’Ž

The Laravel Collection class is packed with powerful methods that can simplify your coding tasks. One such feature is the undot() method, which allows you to transform dot-noted strings back into nested arrays effortlessly. This can be particularly useful when working with complex, hierarchical data structures. Let's explore how to use this method with different real-life examples.

What is undot()?

The undot() method converts a collection with dot-noted keys into a nested array. This can be very handy when you need to restructure flat configurations or any other flat data that uses dot notation for nesting.

Real-Life Example 1: Transforming Product Attributes

Imagine you are working on an e-commerce platform, and you have product attributes stored in a flat structure using dot notation. At some point, you may need to convert this flat data back into a nested array to make it easier to manage and display product details.

Example Code

Let's start by creating a collection with product attributes in dot notation:

// Collection of product attributes in dot notation
$productAttributes = collect([
    '' => 'Smartphone',
    'product.specifications.screen_size' => '6.5 inches',
    'product.specifications.battery' => '4000 mAh',
    '' => '12 MP',
    'product.price' => 699.99,

// Convert dot-noted keys to nested array
$product = $productAttributes->undot();



    "product" => [
        "name" => "Smartphone",
        "specifications" => [
            "screen_size" => "6.5 inches",
            "battery" => "4000 mAh",
            "camera" => "12 MP"
        "price" => 699.99

In this example, we start with a collection containing product attributes where the keys are in dot notation. By applying the undot() method, we convert this flat structure into a nested array, making it easier to work with the data, especially when you need to display product details in a structured format.


The undot() method is a powerful addition to the Laravel Collection methods, allowing you to handle and transform data structures efficiently. By leveraging this method, you can ensure that your application processes data in a clean and maintainable way, especially when dealing with hierarchical or nested information.

Subscribe to Harris Raftopoulos

Don’t miss out on the latest issues. Sign up now to get access to the library of members-only issues.