Description:
I have the Object $xml. It has the simplexml Obj $xml::xml. The “reproduce code” lines stop my apache2 for this one script. Firefox does not load the page, konqueror says that “Connction to localhost ist broken” and IE displas a site which says “technical problems”.
Reproduce code:
// $xml->xml->news->text
/* $xml->xml->news->text */
# $xml->xml->news->text
Expected result:
Nothing, it's only a comment to remember how ot worked before
Actual result:
Firefox does not load the page, konqueror says connection broken and IE displays a "technical error" page.
Welcome to SitePoint.
SitePoint is not the place to file PHP bugs, despite having some of the brightest minds visiting/contributing from time to time. 
If you want to file a bug report, you can do it here.
For what’s worth though, the code you posted does not crash here. Increase your error reporting and try again.
<?php
error_reporting(-1);
ini_set('display_errors', true);
// $xml->xml->news->text
/* $xml->xml->news->text */
# $xml->xml->news->text
echo 'Hello World';
This is not reproduce code; it is three lines of plain text (i.e. not even PHP comments). Reproduce code should be a concise, clear, standalone script which we can copy/paste and see the error happening (or not happening).