I was searching for 'case sensitive', and saw this in the fopen() manual (in search result, that short part of the file):

--
If filename begins with "http://www.php.net/manual/en/function.fopen.php#AEN24371">case sensitive), an HTTP 1.0
--

But when you open the file, it says:

--
 If filename begins with "http://" (not case sensitive), an HTTP 1.0
--

With other words, the Search Engine likes rewriting 

--
http://" (not 
--

to

--
http://www.php.net/manual/en/function.fopen.php#AEN24371">
--

For no reason at all! It is kind of enoying :)