Date validation?

[eluser]Hitesh Chavda[/eluser]
I am using this

Code:

function _check_date($str)
    {
        $three = explode("-",$str);
        if(count($three) <= 2)
        {
            $this->form_validation->set_message('_check_date','Date must be in dd-mm-yyyy format.');
            return false;
        }
        else
        {
            if(!checkdate((int)$three[0],(int)$three[1],(int)$three[2]))
            {
                $this->form_validation->set_message('_check_date','Date must be valid.');
                return false;
            }
            else{ return true; }
        }
    }