4.7.x form.inc form_clean_id($id = NULL)
5.x form.inc form_clean_id($id = NULL)
6.x form.inc form_clean_id($id = NULL, $flush = FALSE)

Remove invalid characters from an HTML ID attribute string.


$id: The ID to clean.

Return value

The cleaned ID.

Related topics

3 calls to form_clean_id()
drupal_prepare_form in includes/form.inc
Prepares a structured form array by adding required elements, executing any hook_form_alter functions, and optionally inserting a validation token to prevent tampering.
expand_radios in includes/form.inc
Roll out a single radios element to a list of radios, using the options array as index.
form_builder in includes/form.inc
Adds some required properties to each form element, which are used internally in the form API. This function also automatically assigns the value property from the $edit array, provided the element doesn't already have an assigned value.


includes/form.inc, line 1611


function form_clean_id($id = NULL) {
  $id = str_replace(array(
    ' ',
  ), '-', $id);
  return $id;