Генератор пользователей

<?php
$i = 0;
$arGenders = [
    'M' => 10,
    'F' => 10,
];
$domain = 'ski.sport.insmart.ru';
$sPassword = 'useruser';
$sPhone = '89690000000';
global $DB;
$sDatePattern = $DB->DateFormatToPHP(CSite::GetDateFormat("SHORT"));
$sEmailPattern = 'user{index}@{domain}';
$obUser = new \CUser();
$arNames = [
    'M' => [
        'Андрей',
        'Владлен',
        'Иван',
        'Игорь',
        'Илья',
        'Олег',
        'Кирилл',
        'Данила',
        'Александр',
    ],
    'F' => [
        'Анастасия',
        'Екатерина',
        'Мария',
        'Оксана',
        'Таисия',
        'Елена',
    ]
];
$arSurnames = [
    'Иванов',
    'Петров',
    'Сидоров',
    'Калмыков',
    'Пчелин',
    'Фикусин',
    'Шариков',
    'Пастухов',
    'Петухов',
    'Филонин',
    'Афонин',
    'Есенин',
    'Пушкин',
    'Лермонтов',
];

$arYearsBounds = [
    'MIN' => 14,
    'MAX' => 60,
];
$arCities = [
    'Москва',
    'Мурманск',
    'Калининград',
    'Астрахань',
    'Екатеринбург',
    'Санкт-Петербург',
    'Саратов',
    'Энгельс',
    'Владимир',
    'Ярославль',
    'Тула',
];


foreach($arGenders as $gender => $count){
    if($count > 0){
        for($j = 0; $j < $count; $j++){
            $i++;
            $sPhone++;
            $name = $arNames[$gender][rand(0, count($arNames[$gender])-1)];
            $surname = $arSurnames[rand(0, count($arSurnames)-1)];
            switch($gender){
                case 'M':
                    break;
                case 'F':
                    $surname .= 'а';
                    break;
            }
            $email = str_replace(['{index}', '{domain}'], [$i, $domain], $sEmailPattern);
            $years = rand($arYearsBounds['MIN'], $arYearsBounds['MAX']);
            $birthday = new \DateTime();
            $birthday->modify('-'.$years.' years');
            $days = rand(0, 364);
            $birthday->modify('+'.$days.' days');
            $city = $arCities[rand(0, count($arCities)-1)];
            $arUser = [
                'LOGIN' => $email,
                'EMAIL' => $email,
                'NAME' => $name,
                'LAST_NAME' => $surname,
                'PASSWORD' => $sPassword,
                'CONFIRM_PASSWORD' => $sPassword,
                'ACTIVE' => 'Y',
                'PERSONAL_GENDER' => $gender,
                'PERSONAL_BIRTHDATE' => $birthday->format($sDatePattern),
                'PERSONAL_BIRTHDAY' => $birthday->format($sDatePattern),
                'PERSONAL_PHONE' => $sPhone,
                'PERSONAL_MOBILE' => $sPhone,
                'PERSONAL_CITY' => $city,
                'PERSONAL_COUNTRY' => 1,
            ];
            $id = $obUser->add($arUser);
            if(!$id){
                var_dump($obUser->LAST_ERROR);
            }
        }
    }
}