Strict Standards: Only variables should be passed by reference

If you have STRICT error reporting set on your server and running php 5.xx you will receive the following error;

Strict Standards: Only variables should be passed by reference in /your_root/.../includes/MXSearch/KT_MXSearcgConfig.class.php on line 122
In php 5.xx you are not allowed to change the return value of a function.

Basically you can't say foo() returned 'ABC' but we want to make it return 'XYZ'. That is exactly what is happening on line 122

However, if we say $protocol = foo() then we can manipulate $protocol in whatever way we want.

Change line 122 from

$protocol = strtolower(array_shift(explode('/', $_SERVER['SERVER_PROTOCOL'])));

to

$protocol = explode('/', $_SERVER['SERVER_PROTOCOL']);
$protocol = strtolower(array_shift($protocol));