6 calls to form_clean_id() in Drupal 6

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.

drupal_process_form in includes/form.inc

This function is the heart of form API. The form gets built, validated and in appropriate cases, submitted.

expand_radios in includes/form.inc

Roll out a single radios element to a list of radios, using the options array as index.

filter_form in modules/filter/filter.module

Generates a selector for choosing a format in a form.

template_preprocess_page in includes/theme.inc

Process variables for page.tpl.php

_form_builder_handle_input_element in includes/form.inc

Populate the #value and #name properties of input elements so they can be processed and rendered. Also, execute any #process handlers attached to a specific element.