How can i change my code to work when REGISTERED GLOBALS is no longer supported?

<?php

/* PLEASE DO NOT ALLOW EVEN ONE BLANK SPACE/LINE IN THIS FILE OUTSIDE '<?php' AND '?>' */

error_reporting(1);import_request_variables('gpc');error_reporting(8);


/* ------ BLAB SETTINGS ------  */


$db_type='mysql';                    // database type, *lowercase* ( options: mysql, mysqli, postgre, sqlite, pdo_sqlite )

$db_host='MYSQL';                // database host ( in most cases 'localhost' )
$db_user='username';                         // database user (not used with sqlite)
$db_pass='password';                         // database password  (not used  with sqlite)
$db_name='Chat3';                         // Database [mysql, postgre]. Note that the installation script cannot create a database for you!
$db_sqlite='sqlite/blab.dat';        // Database [sqlite]: 'path/filename', a 0-byte file CHMODed to 777 )

$skin_dir='skin4x-a';                // skin directory, no trailing slashes


/* ------- INTEGRATION -------  */


$intg_bb_cms='blab';                 // integration with: *lowercase*
                                     // [available options: blab, ipb1, ipb2, phpbb2, phpbb3, vb, smf1, smf2, wbb, wcf, punbb, e107, mambo, joomla, phpfusion, phpnuke, postnuke, eengine, phorum, mybb, vanilla] (blab == standalone)

$intg_cookie='';                     // Session coookie [or other cookie] set by your phpBB, IPB, vB, Joomla etc. 
                                     // example: http://hot-things.net/cs/article.php?aid=122

$intg_prefix='';                     // Table prefix of your phpBB, IPB, vB, Joomla etc database tables 
                                     // The prefix must include the sign _ if exists { e.g. $intg_prefix='phpbb_'; }

$intg_suffix=0;                      // [1 or 0] displays the sign ^ after phpBB, IPB, vB, Joomla etc usernames
$intg_showex=0;                      // [1 or 0] show or hide the logout link, 0 when embeded in an iframe, otherwise leave it 1 and set $intg_exitlnk

$intg_moders=array();                // Moderators to import. This should be an array, e.g. array(1,6,432,8839); where each number is the user ID of the user from your phpBB, vB, IPB etc user table

$intg_extlnk='../';                  // logout link [URL or relative path], default one level up: $intg_exitlnk='../';
$intg_rlpath='../';                  // URL or relative path to your phpBB, IPB, vB, Joomla etc, default one level up: $intg_rlpath='../'; [must end with a trailing slash]

$intg_nolglk='login.php';            // where to redirect users that are not logged onto your phpBB, IPB, vB, Joomla etc. 
                                     // 'register.php' - register blab account [if allowed: Admin CP -> Settings]
                                     // 'login.php' - login as guest [if allowed: Admin CP -> Settings]

$encoding='iso-8859-1';              // the encoding used in your phpBB, IPB, vB, Joomla etc.

$cookie_seed='';                     // PunBB only!  Can be found in 'punbb/config.php'


/* DO NOT TOUCH ANYTHING BELOW THIS LINE UNLESS YOU ARE ABSOLUTELY SURE WHAT YOU ARE DOING! */


$default_timezone=0;                 // default timezone: 0=GMT [from -12 to 12]
$default_timeform=0;                 // default time format [0-5] default:0, no timestamp: 5
$default_language=0;                 // default language: an array element # from the array $lang_files() in 'lang/languages.inc' [PHP arrays start from 0]
$default_emoticon=1;                 // default smilies & colors: off/on [0-1]
$default_soundenb=1;                 // default sound: off/on [0-1]

$administrators=array(1);            // Administrators. This should be an array, e.g. array(1,2,3,55); where each number is the user ID of the user from the 'blab_users' table

$error_log='errors.txt';             // CHMODed to 777 file to store sql errors if any ( it is strongly recommended to rename this file )
$salt='RandOM_StRiNG_123';           // Salt. 
$prefix='blab';                      // Table prefix for BlaB! tables
                                     // You may change both salt & table prefix before running the installation.
                                     // You MUST NOT change salt & table prefix later!

$pconnection=0;                      // [0 or 1] Establishes a persistent connection to the SQL server. If you are not sure leave it 0.
$update=6;                           // seconds [6-20]
$session=48;                         // hours to remember the login cookie [6-8544, 8544 hours = 1 year]
$history=168;                        // hours to keep messages in db [168 hours = 1 week, 8544 = 1 year]
$lat_msgs=15;                        // number of messages to be shown when entering a room [5-20]
$ads_fqcy=0;                         // ads frequency. [0-100] 0 = never, 100 = after each message [acceptable level 5-10]
?>

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function neutral_dbconnect(){
global $db_host,$db_user,$db_pass,$db_name;
mysql_connect($db_host,$db_user,$db_pass) or process_error('Cannot connect to database. Please, check config.php...');
mysql_select_db($db_name) or process_error(mysql_error());}

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