Description:
------------
when I use

include("http://".$_SERVER['HTTP_HOST']."/bread.php");

and

include("bread.php");

the include found both files.  But when I try to instantiate an instance of an class in bread.php, only include("bread.php"); works???????

the reason I am using $_server variable is to have an absolute path for file at different subdirectories to call bread.php

Reproduce code:
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//include("http://".$_SERVER['HTTP_HOST']."/bread.php");

include("bread.php");
$b =new bread();
echo $b->trace($ctid, $pctid);

//works fine but if I use

include("http://".$_SERVER['HTTP_HOST']."/bread.php");
//include("bread.php");
$b =new bread();
echo $b->trace($ctid, $pctid);\

//I got the error in the following section.  

Expected result:
----------------
no error

Actual result:
--------------
Fatal error: Cannot instantiate non-existent class: bread in /hsphere/local/home/developm/hsc.development.complexusgroup.com/common/header.php on line 67