I can\'t get access to my WP (version3.4.2) admin. It says as mentioned above
Fatal error: Cannot re-assign auto-global variable _POST in /home/xxx/p
@user3450716, the only thing you need to do, as Abhik Chakraborty said, is to delete the $_POST from your function rt_check_sidebar parameters and leave the function with no parameters, like this:
your line 540:
function rt_check_sidebar_array($_POST){
change it to:
function rt_check_sidebar_array(){