taxonomy_form_vocabulary_validate

Versions

mediamosa-21

taxonomy_form_vocabulary_validate($form, &$form_state)

Validation handler for the vocabulary form.

See also

taxonomy_form_vocabulary()

Code

modules/taxonomy/taxonomy.admin.inc, line 170

<?php
function taxonomy_form_vocabulary_validate($form, &$form_state) {
  if ($form_state['clicked_button']['#value'] != t('Delete') && isset($form_state['values']['machine_name'])) {

    // Restrict machine names to appropriate characters.
    $machine_name = $form_state['values']['machine_name'];
    if (!preg_match('!^[a-z0-9_]+$!', $form_state['values']['machine_name'])) {
      form_set_error('machine_name', t('The machine-readable name must contain only lowercase letters, numbers, and underscores.'));
    }
    // Restrict machine names to 21 characters to avoid exceeding the limit
    // for field names.
    if (drupal_strlen($machine_name) > 21) {
      form_set_error('machine_name', t('The machine-readable name must not exceed 21 characters.'));
    }

    // Do not allow duplicate machine names.
    $vocabularies = taxonomy_get_vocabularies();
    foreach ($vocabularies as $vocabulary) {
      if ($machine_name == $vocabulary->machine_name && (!isset($form_state['values']['vid']) || $vocabulary->vid != $form_state['values']['vid'])) {
        form_set_error('machine_name', t('This machine-readable name is already in use by another vocabulary and must be unique.'));
      }
    }
  }
}
?>