Description:
------------
When a string contains a closing comment */ PHP fails to interpret it as a string.

My best guess is that the initial parser is looking for comments BEFORE interpreting the structure.

Test script:
---------------
<?php
function xml_cleaner($xml)
{
/*
 //Remove CSS Comments (they conflict with checking for proper element nesting):
 $xml = str_replace('/*', '__com0', $xml);
 $xml = str_replace('*/', 'com1__', $xml);//Bug here.
 $xml = preg_replace('/__com0.*?com1__/s', '', $xml);
*/
}
?>

Expected result:
----------------
The parser should ignore comments contained within strings.

Actual result:
--------------
Parse error: syntax error, unexpected 'com1__' (T_STRING) in bug.php on line 7