Someone

#!/usr/bin/php
<?

class mystream {
    function stream_open($path, $mode, $options, &$opened_path) {
        return true;
    }

    function dir_opendir($url, $options) {
        return true;
    }
}

if(!stream_wrapper_register("test", "mystream"))
{
        die("test wrapper registration failed");
}

mkdir("test://a");
$dir = opendir("test://a");     //here occur segment fault.