<?php

class CCaptchaAgent
{
	public static function DeleteOldCaptcha($sec = 3600)
	{
		global $DB;

		$sec = intval($sec);

		$time = $DB->CharToDateFunction(GetTime(time()-$sec,"FULL"));
		if (!$DB->Query("DELETE FROM b_captcha WHERE DATE_CREATE <= ".$time))
			return false;

		return "CCaptchaAgent::DeleteOldCaptcha(".$sec.");";
	}
}