Fix for Multipage User Registration

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<?php
/**
*	The purpose of this module is to take the user-registration form and make it
* 	multipage, where the pages change depending on the options selected during 
*	the last step. Needs to integrate with either content profiles or the default 
*   user profiles. 
*/

function multipage_register_help($path, $arg){
	$output = '';
	switch($path){
		case "admin/help/#multipage_register";
			$output = '<p>'.t("Enables Multipage Register.");
	}
}

function multipage_register_perm(){
	return array('access multipage register form', 'administer multipage form');
}

function multipage_register_menu(){
	$items = array();
	
	$items['admin/advanced_roles/settings'] = array(
		'title' => 'Multipage Form Settings',
		'page callback' => 'drupal_get_form',
		'page arguments' => array('multipage_register_settings_form'),
		'description' => 'Administer the Multipage Form settings.',
		'access arguments' => array('administer multipage form'),
	);
	
	$items['add/user'] = array(
		'title' => 'Create a new user',
		'page callback' => 'drupal_get_form',
		'page arguments' => array('multipage_register_user_form'),
		'description' => 'Add a new user via multipage',
		'access arguments' => array('access multipage register form'),
	);
	return $items;
}

function multipage_register_settings_form(){
	$form = array();
	//Settings here.
}

/**
*	Step 1 (START)
*/
function _multipage_register_user_form_start(){
	$form['name'] = array(
		'#type' => 'textfield',
		'#title' => t('Name'),
		'#required' => TRUE,
	);
	$form['mail'] = array(
		'#type' => 'textfield',
		'#title' => t('Email'),
		'#required' => TRUE,
	);
	$form['mail_confirm'] = array(
		'#type' => 'textfield',
		'#title' => t('Email (confirm)'),
		'#required' => TRUE,
	);
	$form['continue'] = array(
		'#type' => 'submit',
		'#value' => 'Continue',
	);
	//Special value elements
	$form['this_step'] = array(
		'#type' => 'value',
		'#value' => 'start',
	);
	$form['step_next'] = array(
		'#type' => 'value',
		'#value' => '_multipage_register_user_form_step2',
	);
	return $form;
}

/**
*	Step 2 (Is Dealer or Employee?)
*/
function _multipage_register_user_form_step2(){
	$form['employee'] = array(
		'#type' => 'radios',
		'#title' => t('Is this user an Employee?'),
		'#required' => TRUE,
		'#options' => array(
					  	0 => 'No',
					    1 => 'Yes',
					  ),
	);
	$form['dealer'] = array(
		'#type' => 'select',
		'#title' => t('Is this user a Dealer Admin or Dealer Tech?'),
		'#required' => TRUE,
		'#options' => array(
						0 => 'No',
						1 => 'Yes',
					  ),
	);
	$form['continue'] = array(
		'#type' => 'submit',
		'#value' => 'Continue'
	);
	//Special value elements
	$form['this_step'] = array(
		'#type' => 'value',
		'#value' => 'step2'
	);
	$form['step_submit'] = array(
		'#type' => 'value',
		'#value' => '_multipage_register_user_form_special_submit',
	);
	return $form;
}
/**
*	Step 3 (Dealer version)
*/
function _multipage_register_user_form_dealer($form_state){
	$form['department'] = array(
		'#type' => 'textfield',
		'#title' => t('Company'),
		'#required' => FALSE,
	);
	$form['this_step'] = array(
		'#type' => 'value',
		'#value' => 'step3'
	);
	$form['step_submit'] = array(
		'#type' => 'value',
		'#value' => '_multipage_register_form_submit',
	);
}
/**
*	Step 3 (Employee version)
*/
function _multipage_register_user_form_employee($form_state){
	$form['department'] = array(
		'#type' => 'textfield',
		'#title' => t('Department'),
		'#required' => FALSE,
	);
	$form['this_step'] = array(
		'#type' => 'value',
		'#value' => 'step3'
	);
	$form['step_submit'] = array(
		'#type' => 'value',
		'#value' => '_multipage_register_form_submit',
	);
}

/*
* Custom Submit Handler
*/
function _multipage_register_user_form_special_submit($form, &$form_state){
	if($form_state['values']['employee'] == 1){
		$form_state['values']['step_next'] = '_multipage_register_user_form_employee';
	}
	elseif($form_state['values']['dealer'] == 1){
		$form_state['values']['step_next'] = '_multipage_register_user_form_dealer';
	}
}
/*
* Main Submit handler
*/ 
function multipage_register_form_submit($form, &$form_state){
	if(empty($form_state['storage'])){
		$form_state['storage'] = array();
		$form_state['storage']['values'] = array();
	}
	//Call user-defined submit function
	if (!empty($form_state['values']['step_submit'])) {
    	$function = $form_state['values']['step_submit'];
    	$function($form, $form_state);
  	}
	//Store submitted form values. Must happen after the call to user-defined submit to allow modifying.
	$this_step = $form_state['values']['this_step'];
	$form_state['storage']['values'][$this_step] = $form_state['values'];
	//Set up next step.
	if(!empty($form_state['values']['step_next'])){
		$form_state['storage']['step'] = $form_state['values']['step_next'];
	}
	else{
		//Form Complete!!!
		$values = $form_state['storage']['values'];
		//Do something with $values
		//Set $form['#redirect'] to not return to the first step.
		drupal_set_message(t('Complete! !values', array('!values' => print_r($values, TRUE))));
	}
}
/*
* Form Validation Controller
*/

function multipage_register_form_validate($form, &$form_state){
	if(!empty($form_state['values']['step_validate'])){
		$function = $form_state['values']['step_validate'];
		$function($form, $form_state);
	}
}

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Fix for Multipage User Registration