get values from form API checkboxes - drupal-6

Question

This is a module that I'm working on to create a custom filtered search. But i have no idea on getting the values of form type checkboxes... I searched but nothing yet!
<?php
function my_module_menu() {
$items = array();
$items['my_module/form'] = array(
'title' => t('My form'),
'page callback' => 'my_module_form',
'access arguments' => array('access content'),
'description' => t('My form'),
'type' => MENU_CALLBACK,
);
return $items;
}
function my_module_form() {
return drupal_get_form('my_module_my_form');
}
function my_module_my_form($form_state) {
$form['name'] = array(
'#type' => 'fieldset',
'#title' => t('Search'),
'#collapsible' => TRUE,
'#collapsed' => FALSE,
);
// Removes the #required property and
// uses the validation function instead.
$form['name']['first'] = array(
'#type' => 'textfield',
'#title' => t('Search'),
'#default_value' => "Keyword",
'#description' => "Please enter your keyword.",
'#size' => 20,
'#maxlength' => 20,
);
$form['name']['filter'] = array(
'#type' => 'fieldset',
'#title' => t('Filter'),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
);
$form['name']['filter']['node_options'] = array(
'#type' => 'checkboxes',
'#title' => t('Default options'),
'#default_value' => variable_get('node_options', 0),
'#options' => array(
'31' => t('Chinese'),
'28' => t('South Indian'),
'18' => t('Pizza'),
),
'#description' => t('Filter the results.'),
);
$form['name']['submit'] = array(
'#type' => 'submit',
'#value' => 'Submit',
);
// Adds a new button to clear the form. The #validate property
// directs the form to use a new validation handler function in place
// of the default.
/* $form['clear'] = array(
'#type' => 'submit',
'#value' => 'Reset form',
'#validate' => array('my_module_my_form_clear'),
);*/
return $form;
}
// This is the new validation handler for our Reset button. Setting
// the $form_state['rebuild'] value to TRUE, clears the form and also
// skips the submit handler.
function my_module_my_form_clear($form, &$form_state) {
$form_state['rebuild'] = TRUE;
}
//block
function my_module_block($op = 'list', $delta = 0, $edit = array()) {
$block = array();
switch ($op) {
case 'list':
$block[0]['info'] = t('Custom search form');
break;
case 'view':
switch ($delta) {
case 0:
$block['subject'] = t('Custom search');
$block['content'] = drupal_get_form('my_module_my_form');
break;
}
break;
}
return $block;
}
function my_module_my_form_submit($form, &$form_state) {
$redirect_url = 'search/node/';
$redirect_url .= ' category:' . $form_state['values']['filters'];
$redirect_url .= ' %' . $form_state['values']['first'] . '%';
$form_state['redirect'] = $redirect_url;
}

Answer 1

If you are trying to get the value for the form field that in the form builder is contained in $form['name']['filter']['node_options'], then in the submission handler you need to use $form_state['values']['node_options'].
Also the menu callback should be changed to
$items = array();
$items['my_module/form'] = array(
'title' => t('My form'),
'page callback' => 'drupal_get_form',
'page arguments' => array('my_module_form'),
'access arguments' => array('access content'),
'description' => t('My form'),
'type' => MENU_CALLBACK,
);
There is no need to define two functions, where the first call the second one, to define a form builder.