Sender Bitrix

import csv user list

$cnt = 1;
$strDlmtr = ';';
$lineDlmtr = "\n";
$i = 1;

for ($cnt = 1; $cnt <= 15; $cnt++):

    $arUsers = array();
    $strName = 'users_' . $cnt;

    $expUsersFile = $strName . '.csv';

    $userParams = array(
        'NAV_PARAMS' => array(
            "iNumPage" => $cnt,
            "nPageSize" => 5000
        )
    );

    $arUsers = array('#;ID;Дата регистрации;Фамилия;Имя;EMail');
    $arUsersList = array();

    $db = CUser::GetList(($by = 'date_register'), ($order = 'asc'), array(), $userParams);

    while ($u = $db->Fetch()) {
        $dataReg = explode(' ', $u['DATE_REGISTER']);
        $tmp = array($i++, $u['ID'], $dataReg[0], $u['LAST_NAME'], $u['NAME'], $u['EMAIL']);
        $arUsers[] = implode($strDlmtr, $tmp);
    }
    
    unset($db);

    $strUsers = implode($lineDlmtr, $arUsers);
    $f = file_put_contents($expUsersFile, iconv('utf-8', 'windows-1251//TRANSLIT', $strUsers));


endfor;

Send file email bitrix

//html
<form enctype="multipart/form-data" method="post">
   <input type="file" name="place_file[]" multiple>            
</fotm>

//php
$obContext = Context::getCurrent();
$obRequest = $obContext->getRequest();

$arFileAll = array();
$arFileID = array();

if(!empty($_FILES['place_file'])){
        foreach ($_FILES['place_file']['tmp_name'] as $key => $arFile){
            $arFileAll[$key]['name'] = $_FILES['place_file']['name'][$key];
            $arFileAll[$key]['size'] = $_FILES['place_file']['size'][$key];
            $arFileAll[$key]['tmp_name'] = $_FILES['place_file']['tmp_name'][$key];
            $arFileAll[$key]['type'] = $_FILES['place_file']['type'][$key];
        }
        foreach ($arFileAll as $arFile){
            $arFile['old_file'] = '';
            $arFile['del'] = 'Y';
            $arFile['MODULE_ID'] = 'iblock';

            $arFileID[] = \CFile::SaveFile($arFile, "main");
        }
}

//to IB
$obElement = new CIBlockElement;
$arProp = array(
        "EMAIL" => $strEmail,
        "DATE" => $strDate,
            
        "PLACE_FILE" => $arFileAll
);
$arFields = array(
        'IBLOCK_ID' => $arParams['IBLOCK_ID'],
        'NAME' => $strFieldName,
        'DETAIL_TEXT' => $strDetailText,
        'PROPERTY_VALUES' => $arProp,
        'ACTIVE' => 'N'
);
$obResult = $obElement->Add($arFields);

//to email
$arMailFields = array(
            'EVENT_NAME' => $arParams['EVENT_NAME'],
            'LID' => $obContext->getSite(),
            'C_FIELDS' => array(
                'NAME' => $strName,
                'PHONE' => $strPhone,
            ),
            'FILE' => $arFileID
);
Event::send($arMailFields);

Subscribe group marketing

require $_SERVER['DOCUMENT_ROOT'] . '/bitrix/modules/main/include.php';

use Bitrix\Main\Application;
use Bitrix\Main\Context;

$obRequest = Application::getInstance()->getContext()->getRequest();

if (\Bitrix\Main\Loader::includeModule('sender') && !empty($obRequest->get('email'))) {

    $strEmail = $obRequest->get('email');

    // add row to unsubscribe list
    $contactId = \Bitrix\Sender\ContactTable::addIfNotExist(array('EMAIL' => $strEmail));
    if($contactId)
    {
        \Bitrix\Sender\ContactListTable::addIfNotExist($contactId, 7);

        echo 'ok';
    }


}

перезагружаем Apache

перезагружаем Apache:
service httpd restart

Файл в заказе прикрепить

if($arPropertyFields["TYPE"] === "FILE"){
    $file = $this->request->getFile($arPropertyFields['CODE']);
    $value = CFile::SaveFile($file, strtolower($arPropertyFields['CODE']));
} else{
    foreach ($this->request as $key => $val) {
        if (strtolower($key) == strtolower($arPropertyFields['CODE'])) {
            $value = $val;
        }
    }
}