JSON to PHP Class

Overview

Paste a JSON sample and the generator emits PHP classes with typed properties, a constructor, and a fromArray static factory plus a toArray method. Nested objects become their own classes; arrays of objects become typed arrays with PHPDoc annotations.

It's for PHP developers consuming JSON APIs, hand-rolling DTOs without a heavy serialisation library, or scaffolding models for a Laravel project. Reach for it when building an SDK wrapper around a third-party API, prototyping a microservice client, or cleaning up legacy code that passes associative arrays everywhere.

How it works

The generator walks the JSON tree and produces a class per object with typed properties (PHP 8.1+ syntax: public readonly int $id). Field names are camelCased; original snake_case keys are remembered in the fromArray/toArray pair so JSON round-trips correctly.

Type inference follows JSON's type system: numbers become int or float based on whether they're integral, booleans become bool, strings become string, arrays become array with a PHPDoc @var Item[] hint, and null values widen the type to nullable (?int).

Examples

• Input:

  {"id": 1, "name": "Alex", "is_active": true}
  

  Output:

  final class User
  {
      public function __construct(
          public readonly int $id,
          public readonly string $name,
          public readonly bool $isActive,
      ) {}
  
      public static function fromArray(array $data): self
      {
          return new self(
              id: $data['id'],
              name: $data['name'],
              isActive: $data['is_active'],
          );
      }
  }
  

• Arrays of objects use PHPDoc:

  /** @param Item[] $items */
  

• Nullable field:

  public readonly ?string $note
  

• Nested object -> separate class file recommendation.

FAQ

Does it target a specific PHP version?

Output assumes PHP 8.1+ (readonly properties, constructor property promotion, named arguments). For older versions, manually rewrite to private properties + getters.

Why readonly?

DTOs are usually immutable. Drop readonly if you need mutability after construction.

How does it handle dates?

ISO 8601 strings stay as string. Add a DateTimeImmutable::createFromFormat call in fromArray if you want typed datetimes.

Will the generated code work with Laravel?

Yes - the classes are plain PHP and integrate fine with Laravel. For Eloquent models you'd want a different shape; this generator targets DTOs.

Try JSON to PHP Class