Description:
------------
I have been trying to use spl_autoload() to load a class located in the same folder. My include path is set to ".".  The class file exists in the same folder, and the class has the same name as the file without the .php extension.

The loading does not work. 

Reproduce code:
---------------
File test.php
<?php
set_include_path('.');
var_dump(get_include_path());

$className = 'ClassA';
spl_autoload($className);
$ins = new $className;
echo $ins->val.'<br>';

?>
File ClassA.php
<?php class ClassA { var $val = 'Hello from class "ClassA"'; } ?>

Expected result:
----------------
string(1) "."

Hello from class "ClassA"

Actual result:
--------------
string(1) "."

Fatal error: Uncaught exception 'LogicException' with message 'Class ClassA could not be loaded' in /home/michael/src/php/tests/spl_autoload/test.php:7
Stack trace:
#0 /home/michael/src/php/tests/spl_autoload/test.php(7): spl_autoload('ClassA')
#1 {main}
  thrown in /home/michael/src/php/tests/spl_autoload/test.php on line 7