Drupal 7 customize user registration form - php

Question

I am new to drupal.
I need to customize a registration form by adding fields like id,mobile etc.
Can I accomplish this by creating a custom module?
If yes could anyone please help me with a brief idea on creating and overriding the default user registration submit function. I have to insert these details to another table and also have to pass the data as a service request.
Ive created a custom module with function
module_form_alter(&$form,&$form_state,$form_id){
$form['#submit'] = 'module_form_submit';
if($form_id == 'user_register_form'){
//print_r($form_id);
$form['email'] = array(
'#type' => 'textfield',
'#title' => t('id'),
'#default_value' => '',
'#size' => 60,
'#maxlength' => 15,
'#required' => TRUE,
);
}
}
function module_form_submit($form, &$form_state){
echo "test";
exit();
}
module_form_alter is being called and I can see the new field on the registration screen but the submit function is still not called. I need to override the default drupal register submit.
I already have the following function in my theme template.php
function templatename_theme() {
$items = array();
$items['user_login'] = array(
'render element' => 'form',
'path' => drupal_get_path('theme', 'portal') . '/templates',
'template' => 'user-login',
'preprocess functions' => array(
'portal_preprocess_user_login'
),
);
$items['user_register_form'] = array(
'render element' => 'form',
'path' => drupal_get_path('theme', 'portal') . '/templates',
'template' => 'user-register-form',
'preprocess functions' => array(
'portal_preprocess_user_register_form'
),
);
$items['user_pass'] = array(
'render element' => 'form',
'path' => drupal_get_path('theme', 'portal') . '/templates',
'template' => 'user-pass',
'preprocess functions' => array(
'portal_preprocess_user_pass'
),
);
return $items;
}
user-register-form.tpl.php
<div class="form-group">
<?php print drupal_render_children($form); ?>
</div>
And page--user--register.tpl.php with the html
<div id="login-page">
<div class="container">
<div class="form-login" >
<h2 class="form-login-heading"><img src="<?php echo drupal_get_path('theme', 'portal') . '/images/logo.png'; ?>" width="100"><?php echo $createaccount; ?></h2>
<div class="login-wrap">
<?php
$elements = drupal_get_form("user_register_form");
$form = drupal_render($elements);
echo $form ?>
<?php if ($messages):?>
<div id="messages-console" class="clearfix">
<div class="grid_12">
<div class="mt-grid-fix">
<?php print $messages; ?>
</div>
</div>
</div>
<?php endif; ?>
</div>
</div>
</div>
</div>
Is this approach fine or should I change this approach inorder to make my custom module functional?

Answer 1

You can go to:
admin/config/people/accounts/fields
and add the fields that you need.
In the fieldset "User settings" don't forget check "Display on user registration form."