install.php

<?php
//no direct file access
if (count(get_included_files()) ==1) {
    $z="HTTP/1.0 404 Not Found";
    header($z);
    die($z);
}

// include_once('../../config.php');
$mod_path = dirname(__FILE__);
$mod_rel = str_replace($_SERVER['DOCUMENT_ROOT'], '', str_replace('\\', '/', $mod_path));
$mod_name = basename($mod_path);
include('lang.functions.php');
include(get_module_language_file($mod_name));

// this function checks the basic configurations of an existing WB intallation
function status_msg($message, $class='check', $element='span')
{
    // returns a status message
    print '<'.$element .' class="' .$class .'">' .$message .'</' .$element.'>';
}

/**********************************************************
 *  - Add field "page_code" to table "pages"
 */

print '<h3>Step 1: Updating database pages entrie</h3>';

$database->field_add(TABLE_PREFIX.'pages', 'page_code', 'INT(11) NOT NULL AFTER `modified_by`');

print '<h3>Step 2: Updating field page_code with page_id by default language</h3>';

$lang_array = get_page_languages(); // check for page languages

if (count($lang_array)) {
    $entries = array();
    $entries = get_page_list(0);
    // fill page_code with $page_id for default_language
    foreach ($entries as $page_id => $val) {
        if ($val['language'] == DEFAULT_LANGUAGE) {
            db_update_field_entry($page_id, 'pages', (int)$page_id);
        }
    }
}