WordPress get values outside function

Solution:

Are you trying to do something like this ?

<?php
function myfunc()
{
 $a=2;
 return $a;
}
function wplogincontrol(){
    $val = myfunc();
    if ($val=="2")
    {
        header"Location: http://www.google.com");
        exit;
    }
}

add_action('login_head', 'wplogincontrol');
?>