wordpress user registration optional fileds with php

Question

The WordPress registration default function just have 3 options:

 <?php wp_create_user( $username, $password, $email ); ?>

If I want to add some other fileds, like age or somtehing else! with written PHP form, how can I do this?

wp_users have some columns, like user_login & user_email $ user_status. Can I add new column like age? And, if I can, how can I register it with php page?

Like function:

wp_create_user( $username, $password, $email ,$age);

If it's impossible, how can I create a new table, like wp_specialusers and access to it using PHP, like:

wpdb::query('insert something to wp_specialusers..?') or
mysql_query('insert ...')

I want like this

<?php /* Template Name: wallet */ ?>
<?php get_header(); ?>
<form action=" --->WHERE!?<--- " method="post">
AGE : <input type="text" name="age">
<button type="submit">
</form>

tnx a lot

Answer 1

You first need to use the wp_create_user( $username, $password, $email ) function like you originally have and then you need to run the wp_update_user() function afterwards to insert additional data. The additional data columns should already exist. If you want to add custom additional user data then you should use a plugin such as AdvancedCustomFields

<?php
$user_id = // ID of the user you just created;

$website = 'http://example.com'; // additional data

$user_data = wp_update_user( 
   array( 
     'ID' => $user_id,
     'user_url' => $website
   )
);

if ( is_wp_error( $user_data ) ) {
    // There was an error; possibly this user doesn't exist.
    echo 'Error.';
} else {
    // Success!
    echo 'User profile updated.';
}
?>

Update: OP wants to insert additional data at the same time of creation.

Then use wp_insert_user()

// Extra info to add
$website = "http://example.com";
$nickname = "Superman";
$description = "My description."

$userdata = array(
    'user_login' =>  'login_name',
    'user_url'   =>  $website,
    'nickname'   =>  $nickname,
    'description'=>  $description,
    'user_pass'  =>  NULL // When creating an user, `user_pass` is expected.
);

$user_id = wp_insert_user( $userdata ) ;

// On success.
if ( ! is_wp_error( $user_id ) ) {
    echo "User created : ". $user_id;
}