Description:
------------
I am trying to sort an array containing file names with SORT_LOCALE_STRING. 
However the result is not consistent when I refresh the page several times. It 
appears to be that the output randomly differs.

This behaviour is only occuring when PHP is compiled with intl (--enable-intl) or 
the pecl extension intl is installed. I foudn this out when I was experiencing 
different behaviour on scandir, which does also a sort.

You can reproduce the problem by executing the following script several times by 
pressing F5 in your browser.

Test script:
---------------
<?php
setlocale(LC_ALL, 'NL_nl');
$files = array('__Abstract.js', '__Abstract.coffee', 'Delete.js', 'Delete.coffee', 'Copy.js', 'Copy.coffee');

sort($files, SORT_LOCALE_STRING);
var_dump($files);
?>

Expected result:
----------------
The script should always have the same output

Actual result:
--------------
 Most of the times I get the following output:

array (
  0 => '.',
  1 => '..',
  2 => '__Abstract.coffee',
  3 => '__Abstract.js',
  4 => 'Copy.coffee',
  5 => 'Copy.js',
  6 => 'Delete.coffee',
  7 => 'Delete.js',
)

But now and then the output is:

array (
  0 => '.',
  1 => '..',
  2 => 'Copy.coffee',
  3 => 'Copy.js',
  4 => 'Delete.coffee',
  5 => 'Delete.js',
  6 => '__Abstract.coffee',
  7 => '__Abstract.js',
)