first-name is copied into the type draft

A key named first-name looked fine in the JSON. Laravel quotes it, and that array syntax is valid. The TypeScript draft and the PHP DTO copy the hyphen into the field name. first-name: string and public string $first-name are what the converter emits. The constructor uses that same hyphen: $this->first-name = $data['first-name'] ?? null. Nothing in the draft renames the key. The blocks below are that object, converted in the browser.

{"first-name":"Ada","role":"engineer"} 

[ 'first-name' => 'Ada', 'role' => 'engineer', ] 

export interface Root { first-name: string; role: string; } 

<?php declare(strict_types=1); class DataTransferObject { public string $first-name; public string $role; public function __construct(array $data = []) { $this->first-name = $data['first-name'] ?? null; $this->role = $data['role'] ?? null; } } 

A list key loses one s

An array of objects drops a single trailing s from the key, then Pascal-cases what remains. items becomes Item, so the field is items: Item[]. status becomes Statu, so the field is status: Statu[]. For {"status":[{"code":"ok"}]} the draft is:

export interface Root { status: Statu[]; } export interface Statu { code: string; } 

The PHP DTO types that property as array. It does not emit a class named Statu.

The class name stays DataTransferObject

The PHP class name does not change. An object value is array, not a child class, so a nested object such as meta is public array $meta. A missing key is still assigned with ?? null, including on a property declared public int $id.

One tip

A trailing comma clears the output. {"a":1,} produces Expected double-quoted property name in JSON at position 7 (line 1 column 8). Repair the text in the JSON formatter, then convert again.

The sample, the CSV cell, and the rest of the questions are in the guide: https://kepttools.com/guides/json-to-typescript-php-dto-laravel