Secret Experience - [Web Site] Problema no Ranking do SW Web Site

Pessoal, tah me ocorrendo uns erros no Ranking:

Citação:

Strict Standards: Creating default object from empty value in C:\xampp\htdocs\onlinerank.php on line 45
Strict Standards: Creating default object from empty value in C:\xampp\htdocs\pvprank.php on line 43
Strict Standards: Creating default object from empty value in C:\xampp\htdocs\pkrank.php on line 43

PKRANK.php

Citação:

<html>
<head>
<title>PK Rank</title>
<body>
<?
include "cfg/config.php";

$ordem = empty($_GET['o']) ? 'pkkills' : base64_decode($_GET['o']);
$sql = mysql_query("SELECT * FROM characters ORDER BY ".$ordem." DESC LIMIT 30") or die(mysql_error());
$array = array('pvpkills' => 'PVP Kills',
'pkkills' => 'PK Kills',
'level' => 'Level',
'karma' => 'Karma'
);
?>
<table width="100%" align="center">
<tr align="center">
<td width="35%"><font color="green" size="1" face="verdana">Nome do Char </td>
<td width="21%"><font color="green" size="1" face="verdana"><?php echo $array[$ordem]; ?> </span></td>
<td width="36%"><font color="green" size="1" face="verdana">Clan</td>
</tr>
<?
$i = 1;
$cor = 0;
while($a = mysql_fetch_object($sql)) {
$cor = $cor + 1;
$bg = $cor % 2 == 0 ? '#F1F1F1' : '#E8E8E8';

if($i == 1) {
$img = "<img src=\"top1.gif\" alt=\"1º Lugar\">";
}elseif($i == 2) {
$img = "<img src=\"top2.gif\" alt=\"2º Lugar\">";
}elseif($i == 3) {
$img = "<img src=\"top3.gif\" alt=\"3º Lugar\">";
}else{
$img = $i."º lugar";
}

$clan = mysql_query("SELECT * FROM clan_data WHERE clan_id = '".$a->clanid."'") or die(mysql_error());
$clans = mysql_fetch_object($clan);

$clans->clan_name = empty($clans->clan_name) ? 'Sem info.' : $clans->clan_name;
?>
<tr align="center">
<td><font size="1" face="verdana" color="#800000"><?php echo $a->char_name; ?></td>
<td><font size="1" face="verdana" color="#800000"><?php echo $a->$ordem; ?></td>
<td><font size="1" face="verdana" color="#800000"><?php echo $clans->clan_name; ?></td>
</tr>
<?
$i++;
}
?>
</table>
</body>
</html>

PVPRANK.php

Citação:

<html>
<head>
<title>PvP Rank</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<body>
<?
include "cfg/config.php";
$ordem = empty($_GET['o']) ? 'pvpkills' : base64_decode($_GET['o']);
$sql = mysql_query("SELECT * FROM characters ORDER BY ".$ordem." DESC LIMIT 30") or die(mysql_error());
$array = array('pvpkills' => 'PVP Kills',
'pkkills' => 'PK Kills',
'level' => 'Level',
'karma' => 'Karma'
);
?>
<table width="100%" align="center">
<tr align="center">
<td width="35%"><font color="green" size="1" face="verdana">Nome do Char </td>
<td width="21%"><font color="green" size="1" face="verdana"><?php echo $array[$ordem]; ?> </span></td>
<td width="36%"><font color="green" size="1" face="verdana">Clan</td>
</tr>
<?
$i = 1;
$cor = 0;
while($a = mysql_fetch_object($sql)) {
$cor = $cor + 1;
$bg = $cor % 2 == 0 ? '#F1F1F1' : '#E8E8E8';

if($i == 1) {
$img = "<img src=\"top1.gif\" alt=\"1º Lugar\">";
}elseif($i == 2) {
$img = "<img src=\"top2.gif\" alt=\"2º Lugar\">";
}elseif($i == 3) {
$img = "<img src=\"top3.gif\" alt=\"3º Lugar\">";
}else{
$img = $i."º lugar";
}

$clan = mysql_query("SELECT * FROM clan_data WHERE clan_id = '".$a->clanid."'") or die(mysql_error());
$clans = mysql_fetch_object($clan);

$clans->clan_name = empty($clans->clan_name) ? 'Sem info.' : $clans->clan_name;
?>
<tr align="center">
<td><font size="1" face="verdana" color="#800000"><?php echo $a->char_name; ?></td>
<td><font size="1" face="verdana" color="#800000"><?php echo $a->$ordem; ?></td>
<td><font size="1" face="verdana" color="#800000"><?php echo $clans->clan_name; ?></td>
</tr>
<?
$i++;
}
?>
</table>
</body>
</html>

ONLINERANK.php

Citação:

<html>
<head>
<title>Online Ranking</title>
<body>
<center>
<?
include "cfg/config.php";

$ordem = empty($_GET['o']) ? 'onlinetime' : base64_decode($_GET['o']);
$sql = mysql_query("SELECT * FROM characters ORDER BY ".$ordem." DESC LIMIT 30") or die(mysql_error());
$array = array('pvpkills' => 'PVP Kills',
'pkkills' => 'PK Kills',
'level' => 'Level',
'karma' => 'Karma',
'onlinetime' => 'Tempo Online'
);
?>
<table width="100%" align="center">
<tr align="center">
<td width="35%"><font color="green" size="1" face="verdana">Nome do Char </td>
<td width="21%"><font color="green" size="1" face="verdana"><?php echo $array[$ordem]; ?> </span></td>
<td width="36%"><font color="green" size="1" face="verdana">Clan</td>
</tr>
<?
$i = 1;
$cor = 0;
while($a = mysql_fetch_object($sql)) {
$cor = $cor + 1;
$bg = $cor % 2 == 0 ? '#F1F1F1' : '#E8E8E8';

if($i == 1) {
$img = "<img src=\"top1.gif\" alt=\"1º Lugar\">";
}elseif($i == 2) {
$img = "<img src=\"top2.gif\" alt=\"2º Lugar\">";
}elseif($i == 3) {
$img = "<img src=\"top3.gif\" alt=\"3º Lugar\">";
}else{
$img = $i."º lugar";
}

$clan = mysql_query("SELECT * FROM clan_data WHERE clan_id = '".$a->clanid."'") or die(mysql_error());
$clans = mysql_fetch_object($clan);

$clans->clan_name = empty($clans->clan_name) ? 'Sem info.' : $clans->clan_name;
?>
<tr align="center">
<td><font size="1" face="verdana" color="#800000"><?php echo $a->char_name; ?></td>
<td><font size="1" face="verdana" color="#800000"><?php echo $a->$ordem; ?></td>
<td><font size="1" face="verdana" color="#800000"><?php echo $clans->clan_name; ?></td>
</tr>
<?
$i++;
}
?>
</table>
</body>
</html>

Ex. do problema:
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Oq Seria Esses Erros? Como Resolve-los?

Aguardo Respostas.