Description:
------------
PHP 5.3.3 or early
There is no file creation if to specify a relative path in a class destructor.

Test script:
---------------
Not work.

<?php

class MyClass
{
     public function __destruct()
     {
         file_put_contents('./filename.txt', 'text');
     }
}

$Object = new MyClass();

?>

Actual result:
--------------
It works:
<?php

class MyClass
{
     public function __destruct()
     {
         file_put_contents('./filename.txt', 'text');
     }
}

$Object = new MyClass();
unset($Object);

?>

or

<?php

class MyClass
{
     public function __destruct()
     {
         file_put_contents($_SERVER['DOCUMENT_ROOT']. '/filename.txt', 'text');
     }
}

$Object = new MyClass();

?>