How to make the Bitrix event handler work?

Question

1C-Bitrix

Here is the code in init.php

<?
AddEventHandler("crm", "OnBeforeCrmLeadAdd", "CheckOnBeforeCrmLeadAdd");
AddEventHandler("crm", "OnAfterCrmLeadAdd", "CheckOnBeforeCrmLeadAdd");
AddEventHandler("crm", "OnAfterExternalCrmLeadAdd", "CheckOnBeforeCrmLeadAdd");

function CheckOnBeforeCrmLeadAdd(&$arFields) {
file_put_contents($_SERVER["DOCUMENT_ROOT"]."/log_lead.log",print_r($arFields,true)."\n",FILE_APPEND);
}

And the handler does not work, the function does not start. What's wrong?...
Leads are added like this:

$obLead = new CCrmLead(false);
    $ID = $obLead->Add($arLead, true, array("REGISTER_SONET_EVENT" => true, "DISABLE_USER_FIELD_CHECK" => true));

Everything seems to be in the docks, but it doesn't work...

Answer 1

Need more context.
I have now put the following code in the PHP console:

AddEventHandler("crm", "OnBeforeCrmLeadAdd", "CheckOnBeforeCrmLeadAdd");
AddEventHandler("crm", "OnAfterCrmLeadAdd", "CheckOnBeforeCrmLeadAdd");
AddEventHandler("crm", "OnAfterExternalCrmLeadAdd", "CheckOnBeforeCrmLeadAdd");

function CheckOnBeforeCrmLeadAdd(&$arFields) {
file_put_contents($_SERVER["DOCUMENT_ROOT"]."/log_lead.log",print_r($arFields,true)."\n",FILE_APPEND);
}

\Bitrix\Main\Loader::IncludeModule('crm');

$obLead = new \CCrmLead(false);
$ID = $obLead->Add(
  $leadfields = ['TITLE'=>'test'],
  true,
  array("REGISTER_SONET_EVENT" => true, "DISABLE_USER_FIELD_CHECK" => true)
);

The file has been created.
Check the rights to the folder where you write the file and check if the crm module is connected on the page.