Problem accured while get the msg undefined index

PHP
1

Hello Friends,

i am working on a site… i got the noticeable error page, i wrote: “notice: Notice: undefined index: user_name in c path.
c:\xampp\htdocs\index.php on line
118” how can i get rid of this writing.

code is bellow

<?PHP
session_name("Metin2Corona");
session_start();
require("./conectare/config.inc.php");
require("./conectare/rights.inc.php");
require("./conectare/functions.inc.php");
$sqlHp = mysql_connect(SQL_HP_HOST, SQL_HP_USER, SQL_HP_PASS);
$sqlServ = mysql_connect(SQL_HOST, SQL_USER, SQL_PASS);
if(!is_resource($sqlServ) OR !is_resource($sqlHp)) {
echo("header('Location: /error/404.php');");}
echo '<?xml version="1.0"?>';
mysql_query("SET NAMES UTF8");
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title><?PHP echo $serverSettings['titel_page']; ?></title>
<!-- CSS -->
<link rel="stylesheet" type="text/css" media="screen" href="css/style.css" />
<link rel="stylesheet" type="text/css" media="screen" href="css/slider.css" />
<link rel="stylesheet" type="text/css" media="screen" href="css/fancybox.css" />
<style type="text/css">
<!--
.style1 {color: #00FFFF}
.style4 {font-size: 12px; }
-->
</style></head><body>
<!-- header-->
<div id="header">
<div class="w960">
<!-- navbar - left -->
<div id="navleft" class="navbar"><ul>
<li><a class="s1" href="index.php">Acasa</a></li>
<?PHP
if(isset($_SESSION['user_admin']) && checkInt($_SESSION['user_admin']) && $_SESSION['user_admin']>=0) {
echo'
<li><a class="s3" href="index.php?s=descarcare">Descarcare</a></li> ';
}
else
{
?>
<li><a class="s3" href="index.php?s=inregistrare">Inregistrare</a></li>
<?PHP
}
?>
<?PHP
if(isset($_SESSION['user_admin']) && checkInt($_SESSION['user_admin']) && $_SESSION['user_admin']>=0) {
echo'
';
}
else {
?>
<?PHP
}
?>
</ul></div>
<!-- logo -->
<div id="logo">
<a href="#" title="SERVERNAME"></a></div>
<!-- navbar - right -->
<div id="navright" class="navbar"><ul>
<li><a class="s2" href="index.php?s=galerie">Galerie</a></li>
<li><a class="s3" href="index.php?s=clasament-bresle">Clasament</a></li>
</ul></div></div></div>
<!-- main -->
<div id="main">
<div class="w960">
<!-- sidebar:left -->
<div id="sb-left" class="sidebar">
<!-- Panou logare -->
<div class='boxui box-title'>
<span class='title-icon icon-user'></span>
<h3>Autentificare</h3></div>
<div class='boxui box-con'>
<?php
if ( $_SESSION ["user_name"] == "") {
?>
<form id="login" action="index.php?s=login" method="post">
<div><input class="bar curved5" AUTOCOMPLETE="off" type="text" class="validate[required,custom[noSpecialCharacters],length[3,16]]" id="username" name="user" maxlength="16" onfocus="if(this.value=='Nume de utilizator') this.value='';" onblur="if(this.value=='') this.value='Nume de utilizator';" value="Nume de utilizator"/>
<Br><input class="bar curved5" AUTOCOMPLETE="off" type="password" class="validate[required,length[5,16]]" id="password" name="pw" maxlength="16" onfocus="if(this.value=='Parola') this.value='';" onblur="if(this.value=='') this.value='Parola';" value="Parola"/><Br>
<input class="btn s1" type="submit" name="login" value="Login"/>
<a href="index.php?s=inregistrare"><input class="btn s2" type="button" name="Login" value="inregistrare" /></a></div>
</form>
<div class="sb-sep"></div>
<?php
} else {
?>
    <img src='img/nota3.png' alt='' width='10' height='10' /><a href='index.php?s=utilizator' class='xlinks'>Datele utilizatorului</a></p>
    <img src='img/nota3.png' alt='' width='10' height='10' /><a href='/itemshop/index.php' class='xlinks'>Incarca Monede Dragon</a></p>
    <img src='img/nota3.png' alt='' width='10' height='10' /><a href='index.php?s=delogare' class='xlinks'>Delogare</a></p>
<?PHP
}
?>
</span><br />
</div>
<div class="boxui box-end"></div>
<!-- Butoane Speciale -->
<a class="sb-special sb-download" href="index.php?s=descarcare">Descarcare</a>
<a class="sb-special sb-community" href="http://annhelps.wikiforum.ro">Forum</a>
<!-- Sponsor -->
<div class="boxui box-title">
<span class="title-icon icon-status"></span>
<h3>Reclama</h3>
</div>
<div class="boxui box-con">
<div class="clearfix"></div>
<center>
<a class="curved5" href="http://google.ro/"><img src="img/reclama.gif" alt="" /> <span></span></a></center>
<div class="sb-sep"></div>
</div>
<!-- Facebook -->
<div class="boxui box-end"></div></div>
<!-- end sidebar:left -->
<?PHP
$includeDir = ".".DIRECTORY_SEPARATOR."pagini".DIRECTORY_SEPARATOR;
$includeDefault = $includeDir."acasa.php";
if(isset($_GET['s']) && !empty($_GET['s'])){
$_GET['s'] = str_replace("\\0", '', $_GET['s']);
$includeFile = basename(realpath($includeDir.$_GET['s'].".php"));
$includePath = $includeDir.$includeFile;
if(!empty($includeFile) && file_exists($includePath))
{
include($includePath);
}
else
{
include($includeDefault);
}
}
else
{
include($includeDefault);
}
?>
<!-- sidebar:right -->
<div id="sb-right" class="sidebar">
<?PHP
if(isset($_SESSION['user_admin']) && checkInt($_SESSION['user_admin']) && $_SESSION['user_admin']>=0) {
?>
<?PHP
}
?>
<div class="boxui box-title">
<span class="title-icon icon-status"></span>
<h3>Statistici joc<span class="boxui box-con sb-status">
</span></h3>
</div>
<div class="boxui box-con sb-status">
<p class="on"/>
<?php
$serverip = "5.93.47.100";
$ip = gethostbyname($serverip);
$portlist=array(3306);
$status=array("<p><font color=#6189ae><span>•</span>Autentificarea este</font>");
$i=0;
foreach ($portlist as $port){
$online = @fsockopen($ip, $port, $errno, $errstr, 1);
if (!$online)
{
echo "".$status[$i]." <font color=red>inchisa!   </font>";
}
else
{
echo "".$status[$i]." <font color=green>deschisa!   </font>";
}
@fclose($online);
$i++;
}
?>
<div class="sb-sep"></div><span>
<p> <font color=#6189ae><span>•</span>300% rata experienta</font></p><div class="sb-sep"></div>
<p> <font color=#6189ae><span>•</span>300% dropul yang</font></p><div class="sb-sep"></div>
<p> <font color=#6189ae><span>•</span>300% dropul itemelor</font></p><div class="sb-sep"></div>
</span></p>
</div>
<div class="boxui box-end"></div>
<!-- Trailer -->
<div class="boxui box-title">
<span class="title-icon icon-vid"></span>
<h3>Trailer</h3>
</div>
<div class="boxui box-con">
<div class="clearfix"></div>
<a id="sbvid" class="curved5" href="http://youtu.be/Bww9paJt9jo"><img src="img/screenshots/video2.jpg" alt="" /> <span></span></a>
<div class="sb-sep"></div>
</div>
<!-- Clasament jucatori -->
<div class="boxui box-title">
<span class="title-icon icon-status"></span>
<h3>Clasament jucatori</h3>
</div>
<div class="boxui box-con">
<div class="clearfix"></div>
<?PHP include("./conectare/top10.php"); ?>
<a href="index.php?s=clasament-jucatori" class="ilink">Clasament intreg</a></div>
<div class="boxui box-end"></div>
<!-- Clasament Bresla -->
<div class="boxui box-title">
<span class="title-icon icon-status"></span>
<h3>Clasament bresle</h3>
</div>
<div class="boxui box-con">
<div class="clearfix"></div>
<?PHP include("./conectare/top5_g.php"); ?>
<a href="index.php?s=clasament-bresle" class="ilink">Clasament intreg</a> </div>
<div class="boxui box-end"></div>
</div>
<!-- end sidebar:left -->
</div>
</div>
<!-- footer -->
<div id="footer">
<div class="w960">
<!-- logo -->
<div class="left">
<p><a href="http://annhelps.wikiforum.ro"><img src="img/logo_small.png" alt="Metin2Corona" /></a>
&copy 2012 Metin2Corona publicat de <a href="http://annhelps.wikiforum.ro">Koronastar</a>.Toate drepturile rezervate.</p>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- JS -->
<script type="text/javascript" src="../ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
<script type="text/javascript">!window.jQuery && document.write('<script src="css/js/jq.min.js"><\\/script>')</script>
<script type="text/javascript" src="css/js/fancybox.js"></script>
<script type="text/javascript" src="css/js/slider.js"></script>
<script type="text/javascript" src="css/js/init.js"></script>
<script type="text/javascript">
<!--
function abreJanela(URL) {
location.href = URL; //
}
//-->
</script>
</body>
</html>

Thanks in advanced…

2

Your conditional tests if it’s empty but doesn’t test if it’s isset() first.

3

I’d do something like this:

if (empty($_SESSION["user_name"])) {
    ...
}