How can I intercept the data of the “Feedback” infoblock in Bitrix after the user clicks the “send” button?

Question

1C-Bitrix

In general, you need to intercept the sent data. And look at their structure, but I don’t know how to do it correctly ...

AddEventHandler('main', 'OnBeforeEventSend', Array("CRestApi", "generateLead"));

class CRestApi
{
    function generateLead(&$arFields)
    {
        file_put_contents(__DIR__ . '/text.txt', print_r($arFields, 1));
    }
}

Tried to use also OnIBlockElementUpdate etc. but nothing is written to the file.

Answer 1

If the form is just a Bitrix form on one page (that is, it is connected as $APPLICATION->IncludeComponent("bitrix:form.result.new"....) - then before this code you can analyze the $_POST in which data filled in.
But, as already mentioned, this is only one of the options.

Answer 2

OnBeforeEventSend - mail event sending event, if you need to catch the element adding event, then - OnAfterIBlockElementAdd: https://dev.1c-bitrix.ru/api_help/iblock/events/on...