/**
* Validates a value using a regular expression
*
* @param string $value Value to be checked
* @param string $pattern A format from Date_Local. Leave NULL to use $this->pattern.
* @return boolean true if $value is valid
*/
function validate($value, $pattern = null)
{
if ($value === null || $value === "") {
return null;
}
if (!isset($pattern) && (!isset($this) || !$this instanceof self)) {
$pattern = parent::getRegex('time');
}
if (isset($pattern)) {
$pattern = self::getRegex($pattern);
}
if (is_int($value) && (isset($pattern) ? $pattern : $this->pattern)) {
return !$this->negate;
}
return parent::validate($value, $pattern);
}
