public function isValid()
{
if (!$this->has_been_validated) {
$this->has_been_validated = true;
$this->cleanData();
foreach ($this->fields as $name => $Field) {
if (!isset($this->data[$name])) {
$this->data[$name] = null;
}
$this->data[$name] = $Field->valid($this->data[$name]);
$this->errors_on_fields = $this->errors_on_fields || $Field->hasErrors();
}
$this->compare();
return !$this->hasErrors();
} else {
FormErrors::alreadyValidated();
}
}
