Fatal error: Cannot re-assign auto-global variable _POST

Question

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

Answer 1

@user3450716. You can't change superglobal variables too, so you can't use unset($_POST[$key])

function rt_check_sidebar_array(){
    $post = $_POST;
    if(is_array($post)){

        $start_unset_count = 0;

        foreach( $post as $key => $value ){
            if( stristr( $key, '_sidebar_name' ) == TRUE && $value == "" ) {                  
                unset( $post[ $key ] );
                $start_unset_count = 1;
            }

            if( $start_unset_count > 0 ){
                unset( $post[ $key ] );
                $start_unset_count++;
            }

            if( $start_unset_count == 6 ){
                $start_unset_count = 0;
            }               
        }
    }

    // idk why you wrote this,
    // because $newPost variable isn't used in the code above and below
    $newPost == $newPost ? $newPost : $post;

    return $post;
}