When you include() a file on a case-insensitive file system, XDebug can get confused about which file you're debugging. This function converts a path with incorrect case to correct case. To test, try var_dump(fixPathCase('/uSr/BiN'));

fixPathCase.php

<?php
function fixPathCase($path) {
    if(!file_exists($path)) {
        return false;
    }
    if(file_exists(strtoupper($path)) && file_exists(strtolower($path))) {
        $parts = explode('/', $path);
        foreach($parts as $k => $i) {
            if($i) {
                foreach(scandir(dirname(implode('/', array_slice($parts, 0, $k + 1)))) as $file) {
                    if(!strcasecmp($file, $i)) {
                        $parts[$k] = $file;
                    }
                }
            }
        }
        return implode('/', $parts);
    } else {
        return $path;
    }
}