[Resolvido] erro na autenticação no login

[Alvaro Jr 2]

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\AppServ\www\index.php:2) in C:\AppServ\www\nav\home.php on line 37

 

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\AppServ\www\index.php:2) in C:\AppServ\www\nav\home.php on line 37

 

Warning: Cannot modify header information - headers already sent by (output started at C:\AppServ\www\index.php:2) in C:\AppServ\www\nav\home.php on line 73

 

 

 

 

<?php require_once('Connections/config.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
 if (PHP_VERSION < 6) {
   $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
 }

 $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

 switch ($theType) {
   case "text":
     $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
     break;    
   case "long":
   case "int":
     $theValue = ($theValue != "") ? intval($theValue) : "NULL";
     break;
   case "double":
     $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
     break;
   case "date":
     $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
     break;
   case "defined":
     $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
     break;
 }
 return $theValue;
}
}
?>
<?php
// *** Validate request to login to this site.
if (!isset($_SESSION)) {
 session_start();
}

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
 $_SESSION['PrevUrl'] = $_GET['accesscheck'];
}

if (isset($_POST['username'])) {
 $loginUsername=$_POST['username'];
 $password=$_POST['password'];
 $MM_fldUserAuthorization = "";
 $MM_redirectLoginSuccess = "painel.php";
 $MM_redirectLoginFailed = "painel.php";
 $MM_redirecttoReferrer = true;
 mysql_select_db($database_config, $config);

 $LoginRS__query=sprintf("SELECT usuarios, senha FROM wd_users WHERE usuarios=%s AND senha=%s",
   GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text")); 

 $LoginRS = mysql_query($LoginRS__query, $config) or die(mysql_error());
 $loginFoundUser = mysql_num_rows($LoginRS);
 if ($loginFoundUser) {
    $loginStrGroup = "";

if (PHP_VERSION >= 5.1) {session_regenerate_id(true);} else {session_regenerate_id();}
   //declare two session variables and assign them
   $_SESSION['MM_Username'] = $loginUsername;
   $_SESSION['MM_UserGroup'] = $loginStrGroup;	      

   if (isset($_SESSION['PrevUrl']) && true) {
     $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];	
   }
   header("Location: " . $MM_redirectLoginSuccess );
 }
 else {
   header("Location: ". $MM_redirectLoginFailed );
 }
}
?>

 

a estrutura do meu site ta assim

 

includer head

 

home conteudo

e aqui esta presente meu forms de login

onde eu click em ok e gera este erro la em cima

 

includer footer

[Tywin 7]

session_start() deve ser a primeira linha de código.

[Alvaro Jr 2]

saquei, resolvi botei no head. continou depois botei no index. resolveu obrigado