->validate()

$person = new DataObjects_Person;
$person->get(12);
$person->setFrom($_POST['input']);
$val = $person->validate();
if ($val === TRUE) {
   $person->update();
} else {
   foreach ($val as $k=>$v) {
      if ($v == false) {
         echo "Il y a quelque chose d'incorrect avec ($k)\n";
      } else {
         echo "($k) est valide\n";
      }
   }
}

/* Dans la classe DataObject_Person */
function validateEmail() {
return Validate::email($this->email, true);
}

function validateHomepage() {
return Validate::url($this->homepage, true);
}
function validateDate() {
return Validate::date($this->date, "%d-%m-%Y", array(01,01,1970), array(01,01,2030));