Как можно отправить данные своего поля в бд?

<div id="info"> 
<div class="form__group"> 
<span class="form__group__title">Основная информация</span> 
<div class="form__row"> 
<label class="form__label">EMAIL</label> 
<input class="form__field registration__field lk__data__field" type="text" name="EMAIL" maxlength="255" value="<?=$arResult["arUser"]["EMAIL"]?>"> 
</div> 
<div class="form__row"> 
<label class="form__label">Наименование организации</label> 
<input class="form__field registration__field lk__data__field" type="text" name="WORK_COMPANY" maxlength="255" value="<?=$arResult["arUser"]["WORK_COMPANY"]?>"> 
</div> 
<div class="form__row"> 
<label class="form__label">Номер телефона</label> 
<input class="form__field registration__field lk__data__field" type="text" name="PERSONAL_MOBILE" maxlength="50" value="<? echo $arResult["arUser"]["PERSONAL_MOBILE"]?>"> 
</div> 
<div class="form__row"> 
<label class="form__label">ИНН</label> 
<input class="form__field registration__field lk__data__field" type="text" name="..." maxlength="255" value="<?=$res["UF_INN"];?>"> 
</div> 
 
</div> 
<div class="form__btn__group"> 
<input type="submit" class="form__button form__save-button" value="Сохранить изменения" name="save"> 
<span class="form__cancel-button"><input type="reset" value="Отменить"></span> 
</div>