不会删除所有带有'delete recursive dir'功能的文件

Question

I try to delete a big directory with a lot of subfolders and files (>1000). There are many functions built for this purpose, I use the following:

function rrmdir($dir) {
        if (is_dir($dir)) {
            $objects = scandir($dir);
            foreach ($objects as $object) {
                if ($object != "." && $object != "..") {
                    if (filetype($dir . "/" . $object) == "dir"){
                        log_message(201,array(),'Try to delete folder: '.$dir.'/'.$object);
                        rrmdir($dir . "/" . $object);
                    }else{
                        log_message(201,array(),'Try to delete FILE: '.$dir.'/'.$object);
                        unlink($dir . "/" . $object);
                    }
                }
            }
            reset($objects);
            rmdir($dir);
        }
    }

The problem is, that many files are left behind. Is this usual behavior, are is something wrong with my code? If it is usual behavior, how can I get around this problem?

Thanks in advance.

Answer 1

Different Operating handles this different. At most OS an filesystems, files can be locked exclusive for read or write operations.

If another process holds the file-handle with a lock, your process may not modify (or delete) the file. This may also be true for different threads.