/**
* Generate Captcha Text
* Generate the new captcha text
*
* @param integer Letters number
* @return void
*/
public static function GerateCaptchaText($number = -1)
{
self::$captcha = NULL;
$number = $number == -1 ? self::$number : $number;
$length = strlen(self::$words);
for ($i = 0; $i < $number; $i++) {
if ($length > 0) {
self::$captcha .= self::$words[mt_rand(0, $length - 1)];
} else {
self::$captch .= chr(mt_rand(65, 90));
}
}
$_SESSION['CTM_SECURE_CAPTCHA'] = md5(sha1(self::$captcha));
}
