Description:
------------
$test = '§abcd';
$test1 = substr($test,1);
echo $test1;

It should return "abcd" it doesnt but: "�abcd"
I tested it does same thing with §, µ, £ and perhaps other char I didn't think of.

Test script:
---------------
$test = '§abcd';
$test1 = substr($test,1);
echo $test1;

Expected result:
----------------
abcd

Actual result:
--------------
�abcd