will that be possible?

Hello,
when i use the following simple code to check for user log-in it is working fine:

<?php
$myuser = "admin";
$mypass = "password";

if ($user == $myuser && $pass == $mypass)

{
header ('location: main.php');

}

else
{
echo"<form action="$PHP_SELF" method="POST">n";
}

?>
----------->HTML CODE<-----------------------
---------------------------------------------
Now, the following code i'm using for getting language phrases from my db for multi-language concept.Itz also working pretty fine!

<?php

include "dbconnection.inc";
include "main_functions.inc";
$p_main = new main_functions;

if ($language_f != "")
$p_main->set_system_language($language_f);
$p_main->get_language_phrases('LOGIN');
?>

followed by the log-in screen code.


NOW, My question is I combined the above two parts of code,and try to log-in but it does'nt control to "main.php ".

Both the parts of code are working when i use them seperately but it does'nt working well if i combine them.I think, the PHP interpreter is'nt checking for $myuser and $mypass.

could somebody pls arrange my code in an orderly way, like, which lines should come first and which next


Many thanks