Blank page when website is hosted online - php

Question

I have build a small website with some php. It works perfectly on my localhost (even without database information it loads the html and css).
However when I put it online I just get a blankpage, no errors, nothing. However when I manually type a page it redirects to the login page (which is good).
Anyone experienced this before?
Thanks
EDIT2: After some debugging advice I got this error
Warning: include_once(classes/users.class.php): failed to open stream:
No such file or directory in
/customers/c/2/9/nicolasdecroos.be/httpd.www/eindwerk/login.php on
line 8 Warning: include_once(): Failed opening
'classes/users.class.php' for inclusion
(include_path='.:/usr/share/php') in
/customers/c/2/9/nicolasdecroos.be/httpd.www/eindwerk/login.php on
line 8 Fatal error: Class 'user' not found in
/customers/c/2/9/nicolasdecroos.be/httpd.www/eindwerk/login.php on
line 9
Edit: Here is the PHP code on the login page
<?php
session_start();
include_once("classes/users.class.php");
$user = new user();
if(isset($_SESSION['loggedin']))
{
header('location: index.php');
}
else
{
if(!empty($_POST))
{
try
{
$user->login($_POST['studentennummer'],$_POST['password']);
}
catch (Exception $error)
{
$message = $error->getMessage();
}
}
}
?>
This is users.class
*Sorry if it's to much code, I'm not sure which part would be the most interesting.
<?php
include_once("classes/db.class.php");
class user
{
private $m_sStudentennummer;
private $m_sPassword;
private $m_sStatus;
public function __get($p_sProperty)
{
switch ($p_sProperty)
{
case 'Studentennummer':
return $this->m_sStudentennummer;
break;
case 'Password':
return $this->m_sPassword;
break;
case 'Status':
return $this->m_sStatus;
break;
}
}
public function __set($p_sProperty, $p_vValue)
{
switch ($p_sProperty)
{
case 'Studentennummer':
$this->m_sStudentennummer = $p_vValue;
break;
case 'Password':
$this->m_sPassword = $p_vValue;
break;
case 'Status':
$this->m_sStatus = $p_vValue;
break;
}
}
public function userCheck($p_sInput)
{
$db = new db();
$sql = "SELECT * FROM users WHERE u_id = '". $p_sInput . "'";
$result = $db->conn->query($sql);
if ($result->num_rows == 0)
{
return "true";
}
else
{
return "false";
}
}
public function login($p_sStudentennummer, $p_sPassword)
{
$db = new db();
$sql = "SELECT * FROM users WHERE u_nr = '".$db->conn->real_escape_string($p_sStudentennummer)."' AND u_pass = '".$db->conn->real_escape_string($p_sPassword)."';";
$result = $db->conn->query($sql);
$rows = $result->fetch_assoc();
$status = "SELECT * FROM users WHERE u_nr = '".$db->conn->real_escape_string($p_sStudentennummer)."' AND u_pass = '".$db->conn->real_escape_string($p_sPassword)."' AND u_group = 'student'";
$statusRes = $db->conn->query($status);
if ($result->num_rows == 1)
{
if ($statusRes->num_rows == 1)
{
$_SESSION['u_id'] = $rows['u_id'];
$_SESSION['loggedin'] = 1;
header('Location: index.php');
}
else
{
$_SESSION['u_id'] = $rows['u_id'];
$_SESSION['loggedin'] = 1;
header('Location: my_events.php');
}
}
else
{
throw new Exception("Username and/or password are invalid.");
}
}
}
?>

Answer 1

Change the error level for the online hosting if you can.
It will display every errors on the screen, but is very useful (for me at least).
<? error_reporting(E_ALL); ?>

Answer 2

Alright,
It was something dumb but I'll post it incase someone has troubles with this.
The map was called "Classes". in the code it was written as "classes".
On localhost it wasn't a problem, but when you put it online it is.