help with registering session variables

[victor78]

I have a user authenication script that I am trying to make work with php version 4.0 to the newest version. Currently, it only works on 4.0 to 4.06. The script below has two things. One is a function that will register any variable. The second is a script that session registers the login and password and encrypts the password with md5. Here is the script I have which unfortunately needs major help. 🙁

function session_reg($var,$val)

{
if (phpversion() > 4.0)
{
$HTTP_SESSION_VARS[$var] = $val;
} else {
if (!session_is_registered($var))
{
session_register($var);
$GLOBALS[$var] = $val;
}
}
}

// make entered information global

$entered_login = $HTTP_POST_VARS['entered_login'];
$entered_password = $HTTP_POST_VARS['entered_password'];

if (phpversion() >= 4) { 
	// phpversion = 4
	session_start();
	$hash = session_id();
	session_unregister("login");
	session_unregister("password");
	session_unregister("location");
						}

	$login = $entered_login;
	// encrypt password if we can
	if (function_exists(md5)) { 
		$password = md5($entered_password);
	} 
	else {$password = $entered_password;} 

	if (phpversion() > 4.0) {
	$page_title = $_SERVER["PHP_SELF"];
	$HTTP_SESSION_VARS['login'] = $login;
	$HTTP_SESSION_VARS['password'] = $password;
	$HTTP_SESSION_VARS['location'] = $_SERVER["PHP_SELF"];
	// make post variables global
	} else {
	$page_title = $PHP_SELF;
	session_register("login");
	session_register("password");
	session_register("location");

	}