Toplan\PhpSms\Sms::validateAgentName PHP Method

    protected static function validateAgentName($name)
    {
        if (!$name || !is_string($name) || preg_match('/^[0-9]+$/', $name)) {
            throw new PhpSmsException("The agent name [{$name}] is illegal. Agent name must be a string, but not be a number string.");
        }
    }