Node form template FATAL ERROR

Here is the code. I am quite a noob and have not yet learned any php so any insights you could provide would be most helpful. thanks

<?php
// $Id: nodeformtemplate.module,v 1.8.2.1 2007/01/27 10:36:39 egonbianchet Exp $

/**
* @file
* Allow users to configure a default template for each node type.
*/

/**
* Implementation of hook_help()
*/
function nodeformtemplate_help($section) {
switch ($section) {
case 'admin/content/types/' . arg(3) . '/nodeformtemplate':
return t("Write the text that you want to be used as a template when creating new %type nodes. Words starting with a % sign will be replaced with the query string parameter having the same name.", array('%type' => node_get_types('name', arg(3))));
}
}

/**
* Implementation of hook_perm()
*/
function nodeformtemplate_perm() {
return array('administer form templates');
}

/**
* Implementation of hook_menu()
*/
function nodeformtemplate_menu($may_cache) {
$items = array();
if (!$may_cache && node_get_types('name', arg(3))) {
$items[] = array (
'path' => 'admin/content/types/' . arg(3) . '/nodeformtemplate',
'title' => t('Form template'),
'callback' => 'drupal_get_form',
'callback arguments' => array(arg(3) . '_template_node_form'),
'access' => user_access('administer form templates'),
'type' => MENU_LOCAL_TASK,
'weight' => 10,
);
}
return $items;
}

/**
* Implementation of hook_forms()
*/
function nodeformtemplate_forms() {
$forms = array();
foreach (node_get_types() as $type) {
$forms[$type->type . '_template_node_form'] = array(
'callback' => 'nodeformtemplate_template_form',
'callback arguments' => array($type)
);
}
return $forms;
}

/**
* Prepare template forms
*/
function nodeformtemplate_template_form($type) {
$node = new stdClass();
$node->type = $type->type;

// We use this flag to know wether we are in a real node form in hook_nodeapi
$node->formtemplate_settings = true;

$form = drupal_retrieve_form($node->type . '_node_form', $node);
foreach (module_implements('form_alter') as $module) {
$function = $module .'_form_alter';
$function($node->type . '_node_form', $form);
}

$form['#id'] = $node->type . '_template_node_form';
$form['#base'] = 'nodeformtemplate_template_form';
$form['reset'] = array('#type' => 'submit', '#value' => t('Reset'), '#weight' => 40);

// unset some known unsupported fields
foreach (array('author', 'options', 'taxonomy', 'menu') as $field) {
foreach (element_children($form[$field]) as $key) {
$form[$field][$key]['#disabled'] = TRUE;
}
}
foreach (element_children($form['body_filter']['format']) as $key) {
$form['body_filter']['format'][$key]['#disabled'] = TRUE;
}
unset($form['preview']);

// remove node validation code and disable non-text fields
_nodeformtemplate_prepare_template_form($form, $values);

return $form;
}

/**
* Filters a standard node form
*/
function _nodeformtemplate_prepare_template_form(&$form, &$values) {
foreach ($form as $key => $value) {
if (is_array($form[$key])) {
if (element_child($key)) {
// disable validation
unset($form[$key]['#validate']);
$form[$key]['#required'] = FALSE;
// disable all non-text fields
if (isset($form[$key]['#type']) && (!in_array($form[$key]['#type'], array('textfield', 'textarea', 'submit')) || isset($form[$key]['#autocomplete_path']))) {
$form[$key]['#disabled'] = TRUE;
}
}
// recurse form fields
_nodeformtemplate_prepare_template_form($form[$key], $values);
}
}
}

/**
* Saves a template
*/
function nodeformtemplate_template_form_submit($form_id, $form_values) {
switch ($form_values['op']) {

case t('Submit'):
foreach (array('nid', 'vid', 'uid', 'created', 'changed') as $field) {
unset($form_values[$field]);
}
$types = node_get_types();
if ($types[$form_values['type']]) {
variable_set('nodeformtemplate_' . $form_values['type'], serialize($form_values));
drupal_set_message(t('Template saved'));
}
break;

case t('Reset'):
$types = node_get_types();
if ($types[$form_values['type']]) {
variable_del('nodeformtemplate_' . $form_values['type']);
drupal_set_message(t('Template cleared'));
}
break;
}
}

/**
* Implementation of hook_nodeapi()
*/
function nodeformtemplate_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
switch ($op) {
case 'prepare':
if (!$node->nid && variable_get('nodeformtemplate_' . $node->type, 0)) {
$template = unserialize(variable_get('nodeformtemplate_' . $node->type, 0));

// Don't do if we are on the form template settings page
if (!$node->formtemplate_settings) {
_nodeformtemplate_replace_placeholders($template);
}

foreach ($template as $key => $value) {
$node->$key = $value;
}

$node->uid = $GLOBALS['user']->uid;
$node->name = $GLOBALS['user']->name;
}
break;
case 'submit':
if (variable_get('nodeformtemplate_' . $node->type, 0) && module_exists('token')) {
$node->body = token_replace($node->body, 'node', $node);
}
break;
}
}

/**
* Replaces placeholder with $_GET values
*/
function _nodeformtemplate_replace_placeholders(&$template) {
foreach ($template as $field => $value) {
if (is_array($value)) {
// recurse
_nodeformtemplate_replace_placeholders($template[$field]);
}
else {
// try to insert query parameters if a placeholder is found
foreach ($_GET as $key => $var) {
if ($var != '') {
$template[$field] = str_replace('%' . $key, $var, $template[$field]);
}
}
// clean remaining placeholders
$template[$field] = preg_replace('/%([a-z]+|[A-Z]+|[0-9]+)+/', '', $template[$field]);
}
}
}