function FileExampleReadWriteForm::validateForm
Overrides FormBase::validateForm
File
-
modules/
file_example/ src/ Form/ FileExampleReadWriteForm.php, line 179
Class
- FileExampleReadWriteForm
- File test form class.
Namespace
Drupal\file_example\FormCode
public function validateForm(array &$form, FormStateInterface $form_state) {
$destination = $form_state->getValue('destination');
if (!$destination) {
$form_state->setError($form['write_file']['destination'], $this->t('You must enter a destination.'));
return;
}
$filename = $this->fileSystem
->basename($destination);
if (!$filename) {
$form_state->setError($form['write_file']['destination'], $this->t('The destination %destination is not valid.', [
'%destination' => $destination,
]));
return;
}
// For security reasons, we only allow writing to the .txt file.
if (!str_ends_with($destination, '.txt')) {
$form_state->setError($form['write_file']['destination'], $this->t("The .txt file is only permitted for the purpose of ensuring the security of the example."));
}
}