Description:
------------
strpos returned some integer,
but haystack didnt contain needle,
integer was in mostly higher than strlen of haystack

Reproduce code:
---------------
please, look at this URL, because of big string used
as haystack I couldnt use textarea in bugreport form

http://kldr.xhosting.cz/cat_hi.php?path=./strpos failed.php

Expected result:
----------------
false

Actual result:
--------------
5225