firstPHP/form.json

{
  "meta": {
    "action": "some",
    "id": "id_form"
  },
  "data": [
    {
      "type": "textInput",
      "name": "email",
      "placeholder": "Email",
      "id": "emailId",
      "label": {
        "title": "Email", "for": "emailId", "class": "form-label"
      },
      "class": "form-control"
    },
    {
      "type": "textInput",
      "name": "phone",
      "placeholder": "Телефон",
      "class": "form-control",
      "style": "color:RED;"
    },
    {
      "type": "select",
      "name": "select_city",
      "class": "form-control",
      "id": "cityId",
      "label": {
        "title": "Выберите город", "for": "cityId", "class": "form-label"
      },
      "value": 2,
      "options": {"1": "Москва", "2":  "Донецк", "3":  "Ростов"}
    },
    {
      "type": "textArea",
      "name": "description",
      "class": "form-control",
      "placeholder": "Описание"
    },
    {
      "type": "checkbox",
      "name": "agree",
      "class": "",
      "id": "agreeId",
      "label": {
        "title": "Согласен с правилами", "for": "agreeId", "class": "form-label"
      }
    },
    {
      "type": "button",
      "value": "Проверить",
      "name": "btn",
      "class": "btn btn-primary"
    }
  ]
}