Certain file names won't 'include'

I am having a VERY strange problem! I have a new site I am working on and have a very basic index.php:

<?php
include_once 'libs/config.inc.php';
function __autoload($className){
require_once 'libs/classes/' . $className . '.class.php';
}
$conn = new mysql;
if ($conn->conn() !== TRUE) {
die("Database connection could not be made");
}
$output = new tables;
$output->table_id = "govt";
$output->table_class = "display";
$table = $output->output_all('government');

include_once 'libs/layout/header.inc.php';
echo $table;
include_once 'libs/layout/footer.inc.php';
?>


This page will not properly include the classes or the header/footer files. If I remove the attempt at including anything but the config.inc.php, I can properly display my constants from that file, so I know that is working. I can also hard code the classes into the index.php file and they work as expect OR if I change the file names to remove the .inc and .class (with exception of the appropriately functioning config.inc.php) then the page also works. I can't for the life of my figure this one out. I have tried just including the header/foot files without the class code and that does work and vice versa.

phpMyAdmin is installed on the server, so I know that this naming convention is working there. What on earth could possibly be going on?

EDIT: Also forgot to mention that is I use 'include_once' instead of 'require_once' for the class autoloader, I get an error message saying the class can't be found on the line tat I try to instantiate it, whereas with require_once I get a blank screen.

It sounds like the paths are incorrect. Do you have error reporting on?
at the top of your file put
error_reporting(E_ALL);
and see if you get any errors for it

Maybe this is useful to you.

I would like to share one very useful tip with include_* statements. For example we have two classes first.class.php and second.class.php both located in the same directory (./classes) and first one uses the second one. So we have:

first.class.php
<?php
include_once './second.class.php';
...
?>

also we have file which uses first.class.php:

<?php
include_once './classes/first.class.php';
...
?>

if you will try to execute your script you will get error. Reason: the current directory is different and the relative path in first.class.php (./second.class.php) will be incorrect.

Here is two possible solution I have found:

<?php
include_once dirname(__FILE__).'/second.class.php';
...
?>

or

<?php
chdir(dirname(__FILE__));
include_once './second.class.php';
...
?>

Hope that tip will be useful for some other software developer

Copied from PHP.NET

It sounds like the paths are incorrect. Do you have error reporting on?
at the top of your file put
error_reporting(E_ALL);
and see if you get any errors for it
I have E_ALL turned on in my php.ini file, it's weird that I wasn't getting any errors output. The file paths are definitely correct, though, because simply renaming the file works.

Maybe this is useful to you.

Copied from PHP.NET

I did see that, but the only file doing any including/requiring is the index.php. The tables class extends the mysql class so it can directly access database call functions, but that wouldn't have any bearing.

So now the weird thing... I found a snippet on a page somewhere about character encoding of the files and that setting to UTF-8 without BOM made his files work and it seems to have made mine work to... Very odd. I think it actually might be related to the MIME type of the file, not the charaset.

this much be work well:

put your all inlcudes file to the same folder/directory
than replace all to:

<?php
include_once 'second.class.php';
.....
?>

or

<?php
require './yourfoldername/second.class.php';
.....
?>
remove or add yourfoldername, or using ../ and make sure you type all correct file name

or put your complete path/ url and all certain files name here..