[RESOLVED] empty validation field regex

[knowj]

within my validation class i have this function:

public function alphanumeric($field, $value, $message=null)
		{
			if (!preg_match("/^[a-zA-Z0-9 -]+$/", $value))
				{
					$this->errors[] = array($field, $value, $message);
					return 0;
				}
			else
				{
					return 1;
				}
		}

How would i go about allowing the field to also be blank? would i need to use and empty() check or can it be done via the regex?

[laserlight]

Instead of using +, use *, so that you match zero or more instead of one or more.