Drupal: full cycle form with parameters and response page - validation

Question

I am trying to make a full cycle form with parameters and response page. Form is working OK, but response page is coming up black. Anyone have a suggestion or model example.
function module99_menu(){
$items = array();
// inital form
$items['module-99'] = array(
'title' => t('Export'), // Page title
'page callback' => 'fn_module99', // function to call when this page is called
'access arguments' => array('access content'), // An array of arguments to pass to the access callback function.
'description' => t('Export'),
'type' => MENU_CALLBACK,
);
// response page
$items['my_module-99-response/%/%'] = array(
'title' => t('Response Page'), // Page title
'page callback' => 'fn_module99_response', // function to call when this page is called
'page arguments' => array(0,1), // pass with arg(0) and arg(1)
'access arguments' => array('access content'),
'description' => t('Export - response form'),
'access callback' => TRUE,
'type' => MENU_CALLBACK,
);
function fn_module99() {
return drupal_get_form('module99_my_form');
}
function module99_my_form_validate($form, &$form_state) {
// do some validation
}
function module99_my_form_submit($form, &$form_state) {
// do some stuff
drupal_set_message(t('The form has been submitted.'));
$parms = "p1=" . "A" . "&p2=" . "B" ;
$form_state['redirect'] = array('my_module-99-response', $parms);
}
function fn_module99_response($parm1,$parm2) {
$output = $parm1 . $parm2;
return $output;
}
function module99_my_form($form_state){
$form = array();
$form['email'] = array(
'#type' => 'textfield',
'#title' => t('E-mail address') ,
'#size' => 64,
'#maxlength' => 64,
'#required' => TRUE,
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Save'),
);
return $form;
}

Answer 1

You should change the redirect a bit:
$form_state['redirect'] = array("my_module-99-response/$param_a/$param_b");
Also in your hook_menu you want to change the page arguments:
$items['my_module-99-response/%/%'] = array(
'page arguments' => array(1,2),
);
This will match the two % in your url, as 0 is 'my_module-99-response'.

Answer 2

I don't know if it will help, but the standard method is to use drupal_get_form on the hook menu with the form id of the form as a parameter. I'm not sure what you are trying to do with the arguments?
$items['my_module-99-response/'] = array(
'title' => t('Response Page'), // Page title
'page callback' => 'drupal_get_form',
'page arguments' => array('fn_module99_response'),
'access arguments' => array('access content'),
'description' => t('Export - response form'),
'access callback' => TRUE,
'type' => MENU_CALLBACK,
);
You should also specify a submit handler in the form using the '#submit' property (make sure you pass an array). Do validation in the same way while you are at it.
function module99_my_form($form_state){
$form = array();
$form['email'] = array(
'#type' => 'textfield',
'#title' => t('E-mail address') ,
'#size' => 64,
'#maxlength' => 64,
'#required' => TRUE,
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Save'),
);
$form['#submit'] = array('module99_my_form_submit') ;
$form['#validate'] = array('module99_my_form_validate') ;
return $form;
}

Answer 3

$form_state['redirect'] = array("my_module-99-response/$param_a/$param_b");
this works great except drupal mangles the slashes with encoding