ERROR -> Warning: mysql_select_db(): supplied argument...

[oNefl0w189]

prueba así:

Código PHP:

<?php 
include('Connections/MiConexion.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 = "autorizacion.php"; 
  $MM_redirectLoginFailed = "login.php"; 
  $MM_redirecttoReferrer = false; 
  mysql_select_db($database_MiConexion, $MiConexion); 
   
  $LoginRS__query=sprintf("SELECT usuario, contrasena FROM usuarios WHERE usuario=%s AND contrasena=%s", 
    GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text"));  
    
  $LoginRS = mysql_query($LoginRS__query, $MiConexion) 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']) && false) { 
      $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];     
    } 
    header("Location: " . $MM_redirectLoginSuccess ); 
  } 
  else { 
    header("Location: ". $MM_redirectLoginFailed ); 
  } 
} 
?> 
 
<?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; 
} 
} 
?>
 

Si no te funciona, prueba poniendo la linea

include('Connections/MiConexion.php');

en esta posicion:

session_start();
}
include('Connections/MiConexion.php');