Bitrix phone validator

CFormCustomValidatorPhone.php

<?php

class CFormCustomValidatorPhone
{
    public function GetDescription()
    {
        return [
            'NAME'            => 'custom_phone', // идентификатор
            'DESCRIPTION'     => 'Телефон',      // наименование
            'TYPES'           => ['text'],       // типы полей
            'SETTINGS'        => ['CFormCustomValidatorPhone', 'GetSettings'],
            'CONVERT_TO_DB'   => ['CFormCustomValidatorPhone', 'ToDB'],
            'CONVERT_FROM_DB' => ['CFormCustomValidatorPhone', 'FromDB'],
            'HANDLER'         => ['CFormCustomValidatorPhone', 'DoValidate'],
        ];
    }

    public function GetSettings()
    {
        return [
            'MASK'  => [
                'TITLE'   => 'Маска для проверки',
                'TYPE'    => 'TEXT',
                'DEFAULT' => '/^(\+7|8) ?[\(]\d{3}[\)] ?\d{3}[- ]\d{2}[- ]\d{2}$/',
            ],
        ];
    }

    public function ToDB($arParams)
    {
        return serialize($arParams);
    }

    public function FromDB($strParams)
    {
        return unserialize($strParams);
    }

    public function DoValidate($arParams, $arQuestion, $arAnswers, $arValues)
    {
        global $APPLICATION;

        foreach ($arValues as $value) {
            if (empty($value)) {
                continue;
            }

            if (!is_scalar($value)) {
                return false;
            }

            try {
                if (!@preg_match($arParams['MASK'], $value)) {
                    throw new Exception('формат телефона неверный');
                }
            } catch (Exception $e) {
                $APPLICATION->ThrowException('#FIELD_NAME#: ' . $e->getMessage());
                return false;
            }
        }

        return true;
    }
}

AddEventHandler('form', 'onFormValidatorBuildList', [
    'CFormCustomValidatorPhone',
    'GetDescription'
]);

init.php

<?php

include_once __DIR__ . '/CFormCustomValidatorPhone.php';