PHP Session doesn't work in my edited script - php

Question

Just edited php sliding jquery panel form and it doesn't work, actually registration works but login doesn't. I erased some code that doesn't matter in my problem...
Please ignore these error messages in this strange language.
<?php
error_reporting(0);
define('INCLUDE_CHECK',true);
require_once($_SERVER['DOCUMENT_ROOT'] . '/config.php');
session_start();
session_name('avaLogin');
session_set_cookie_params(2*7*24*60*60);
if($_SESSION['id'] && !isset($_COOKIE['avaRemember']) && !$_SESSION['rememberMe'])
{
$_SESSION = array();
session_destroy();
}
if(isset($_GET['logoff']))
{
$_SESSION = array();
session_destroy();
echo('<script type="text/javascript">window.location = "' . $SITE_URL .'"</script>');
exit;
}
if($_POST['submit']=='Zaloguj')
{
// Checking whether the Login form has been submitted
$err = array();
// Will hold our errors
if(!$_POST['username'] || !$_POST['password'])
$err[] = 'Wszystkie pola muszą być wypełnione!';
if(!count($err))
{
$_POST['username'] = mysql_real_escape_string($_POST['username']);
$_POST['password'] = mysql_real_escape_string($_POST['password']);
$_POST['rememberMe'] = (int)$_POST['rememberMe'];
echo '';
// Escaping all input data
$row = mysql_fetch_assoc(mysql_query("SELECT id,usr FROM ava_members WHERE usr='{$_POST['username']}' AND pass='".md5($_POST['password'])."'"));
if($row['usr'])
{
// If everything is OK login
$_SESSION['usr']=$row['usr'];
$_SESSION['id'] = $row['id'];
$_SESSION['rememberMe'] = $_POST['rememberMe'];
// Store some data in the session
setcookie('avaRemember',$_POST['rememberMe']);
}
else $err[]='Zły login i/lub hasło!';
}
if($err)
$_SESSION['msg']['login-err'] = implode('<br />',$err);
// Save the error messages in the session
echo('<script type="text/javascript">window.location = "' . $SITE_URL .'"</script>');
exit;
}
else if($_POST['submit']=='Zarejestruj')
{
// If the Register form has been submitted
$err = array();
if(strlen($_POST['username'])<4 || strlen($_POST['username'])>32)
{
$err[]='Twój login musi mieć pomiędzy 3 i 32 znaki!';
}
if(preg_match('/[^a-z0-9\-\_\.]+/i',$_POST['username']))
{
$err[]='Twoje hasło zawiera niedozwolone znaki!';
}
if(!checkEmail($_POST['email']))
{
$err[]='Twój e-mail jest nieprawidłowy!';
}
if(!count($err))
{
// If there are no errors
$pass = substr(md5($_SERVER['REMOTE_ADDR'].microtime().rand(1,100000)),0,6);
// Generate a random password
$_POST['email'] = mysql_real_escape_string($_POST['email']);
$_POST['username'] = mysql_real_escape_string($_POST['username']);
// Escape the input data
mysql_query(" INSERT INTO ava_members(usr,pass,email,regIP,dt)
VALUES(
'".$_POST['username']."',
'".md5($pass)."',
'".$_POST['email']."',
'".$_SERVER['REMOTE_ADDR']."',
NOW()
)");
if(mysql_affected_rows($avalink)==1)
{
send_mail( 'support#avatar.itterek.net',
$_POST['email'],
$SITE_NAME . ' - Twoje hasło',
'Twoje hasło to: '.$pass);
$_SESSION['msg']['reg-success']='Wysłaliśmy do Ciebie e-mail z nowym hasłem!';
}
else $err[]='Ten login jest już w użyciu!';
}
if(count($err))
{
$_SESSION['msg']['reg-err'] = implode('<br />',$err);
}
echo('<script type="text/javascript">window.location = "' . $SITE_URL .'"</script>');
exit;
}
$script = '';
if($_SESSION['msg'])
{
// The script below shows the sliding panel on page load
$script = '
<script type="text/javascript">
$(function(){
$("div#panel").show();
$("#toggle a").toggle();
});
</script>';
}
?>
<link rel="stylesheet" type="text/css" href="<?php echo $LOGIN_URL; ?>/style.css" media="screen" />
<link rel="stylesheet" type="text/css" href="<?php echo $LOGIN_URL; ?>/login_panel/css/slide.css" media="screen" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<!-- PNG FIX for IE6 -->
<!-- http://24ways.org/2007/supersleight-transparent-png-in-ie6 -->
<!--[if lte IE 6]>
<script type="text/javascript" src="login_panel/js/pngfix/supersleight-min.js"></script>
<![endif]-->
<script src="<?php echo $LOGIN_URL; ?>/login_panel/js/slide.js" type="text/javascript"></script>
<?php echo $script; ?>
</head>
<body>
<!-- Panel -->
<div id="toppanel">
<div id="panel">
<div class="content clearfix">
<div class="left">
<h2>REGULAMIN</h2>
<p class="grey">Rejestracja i/lub logowanie oznaczają akceptację regulaminu.
Jeśli jeszcze się z nim nie zapoznałeś to zapraszamy.</p>
<h2>DOŁĄCZ DO NAS</h2>
<p class="grey">Rejestrując się uzyskasz dostęp do szerokiej gamy polskich komiksów avatar the last airbender!</p>
</div>
<?php
if(!$_SESSION['id']):
?>
<div class="left">
<!-- Login Form -->
<form class="clearfix" action="" method="post">
<h1>Logowanie</h1>
<?php
if($_SESSION['msg']['login-err'])
{
echo '<div class="err">'.$_SESSION['msg']['login-err'].'</div>';
unset($_SESSION['msg']['login-err']);
}
?>
<label class="grey" for="username">Login:</label>
<input class="field" type="text" name="username" id="username" value="" size="23" />
<label class="grey" for="password">Hasło:</label>
<input class="field" type="password" name="password" id="password" size="23" />
<label><input name="rememberMe" id="rememberMe" type="checkbox" checked="checked" value="1" /> Pamiętaj mnie</label>
<div class="clear"></div>
<input type="submit" name="submit" value="Zaloguj" class="bt_login" />
</form>
</div>
<div class="left right">
<!-- Register Form -->
<form action="" method="post">
<h1>Jeszcze nie masz konta?!</h1>
<?php
if($_SESSION['msg']['reg-err'])
{
echo '<div class="err">'.$_SESSION['msg']['reg-err'].'</div>';
unset($_SESSION['msg']['reg-err']);
}
if($_SESSION['msg']['reg-success'])
{
echo '<div class="success">'.$_SESSION['msg']['reg-success'].'</div>';
unset($_SESSION['msg']['reg-success']);
}
?>
<label class="grey" for="username">Login:</label>
<input class="field" type="text" name="username" id="username" value="" size="23" />
<label class="grey" for="email">Email:</label>
<input class="field" type="text" name="email" id="email" size="23" />
<label>Hasło zostanie Ci wysłane.</label>
<input type="submit" name="submit" value="Zarejestruj" class="bt_register" />
</form>
</div>
<?php
else:
?>
<div class="left">
<h1>Panel użytkownika</h1>
<p>Twoja subskrypcja wygasa <?php echo '???'; ?></p>
Wyloguj się
</div>
<div class="left right">
</div>
<?php
endif;
?>
</div>
</div> <!-- /login -->
<!-- The tab on top -->
<div class="tab">
<ul class="login">
<li class="left"> </li>
<li>Witaj <?php echo $_SESSION['usr'] ? $_SESSION['usr'] : 'Gościu';?>!</li>
<li class="sep">|</li>
<li id="toggle">
<a id="open" class="open" href="#"><?php echo $_SESSION['id']?'Rozwiń panel':'Login | Reje';?></a>
<a id="close" style="display: none;" class="close" href="#">Zwiń panel</a>
</li>
<li class="right"> </li>
</ul>
</div> <!-- / top -->
</div>
</body>
</html>
The problem is that here:
<li>Witaj <?php echo $_SESSION['usr'] ? $_SESSION['usr'] : 'Gościu';?>!</li>
user does not appear... i tried many ways to fix it and guess what?
everything works but after redirect to other page usr doesnt exists...
CHMOD 755. What's wrong with it?

Answer 1

As documented for session_name(), you MUST set the session name BEFORE you call session_start(). You are also changing the session cookie parameters AFTER session_start().
You cannot do this. session settings must be changed BEFORE you start the session.

Answer 2

I suspect that you working on the session before you've started it may be the problem.