Description:
------------
I think this bug is related to http://pecl.php.net/bugs/bug.php?id=5875 but I have auto_globals_jit set to Off, so I don't think that's affecting the behavior of APC in this instance.

When using PEAR::Text_Highlighter, it works fine on the first load of the page, but on subsequent loads, it fails with many warnings about recursive inheritance and ends with a fatal error about redeclaring a class. When APC is not enabled, this does not occur.

Reproduce code:
---------------
http://manwe.kratzology.com:8080/~ramsey/highlight.phps

In a nutshell, it's this (but the code above shows the CSS that provides the highlighting):

<?php
require_once 'Text/Highlighter.php';
require_once 'Text/Highlighter/Renderer/Html.php';
$options = array(
    'numbers' => 0,
    'tabsize' => 4,
);
$renderer =& new Text_Highlighter_Renderer_HTML($options);
$hl =& Text_Highlighter::factory('php');
$hl->setRenderer($renderer);
$html = $hl->highlight(file_get_contents('filter.php'));

echo $html;
?>

Expected result:
----------------
Should generate highlighted text with PEAR::Text_Highlighter without generating a Fatal error.

See here (where APC is not enabled):
http://manwe.kratzology.com/~ramsey/highlight.php

Actual result:
--------------
Warning: Recursive inheritance called for Text_Highlighter in /data/home/ramsey/public_html/highlight.php on line 39

Warning: Added class text_highlighter in /data/home/ramsey/public_html/highlight.php on line 39

Warning: Recursive inheritance called for PEAR in /data/home/ramsey/php/5/lib/php/Text/Highlighter.php on line 23

Warning: Added class pear in /data/home/ramsey/php/5/lib/php/Text/Highlighter.php on line 23

Warning: Recursive inheritance called for PEAR_Error in /data/home/ramsey/php/5/lib/php/Text/Highlighter.php on line 23

Warning: Added class pear_error in /data/home/ramsey/php/5/lib/php/Text/Highlighter.php on line 23

Warning: Recursive inheritance called for Text_Highlighter_Renderer_Html in /data/home/ramsey/public_html/highlight.php on line 40

Warning: Added class text_highlighter_renderer_html in /data/home/ramsey/public_html/highlight.php on line 40

Warning: Recursive inheritance called for Text_Highlighter_Renderer in /data/home/ramsey/php/5/lib/php/Text/Highlighter/Renderer/Html.php on line 27

Warning: Added class text_highlighter_renderer in /data/home/ramsey/php/5/lib/php/Text/Highlighter/Renderer/Html.php on line 27

Fatal error: Cannot redeclare class text_highlighter_renderer_html in /data/home/ramsey/php/5/lib/php/Text/Highlighter/Renderer/Html.php on line 64