PHP 简易文件查看器

超简易服务器端文件查询器
代码如下：
<?php

// 系统入口

date_default_timezone_set("PRC");

error_reporting(E_ALL & ~E_NOTICE);

set_time_limit(30);

define('DS', DIRECTORY_SEPARATOR);

define('ROOT_PATH', dirname(__FILE__) . DS);

// 登录

if ($_SERVER['PHP_AUTH_USER'] != 'admin' || $_SERVER['PHP_AUTH_PW'] != '123')

{

    header('WWW-Authenticate: Basic realm="用户登录"');

    header('HTTP/1.0 401 Unauthorized');

    die("未登录");

}

$cur_path = $_GET['path'] ?: dirname(__FILE__);

$cur_path = realpath($cur_path);

if (is_file($cur_path))

{

    header('Content-type: text/plain; charset=utf-8');

    echo file_get_contents($cur_path);

    exit;

}

$pre_path = dirname($cur_path);

$list = glob($cur_path . DS . '*');

header('Content-type: text/html; charset=utf-8');

header('Cache-Control: no-cache, must-revalidate, max-age=0');

header('Pragma: no-cache');

?>

<!DOCTYPE html>

<head>

<title>文件管理</title>

</head>

<body style="font-family: consolas">

    <div><?=$cur_path?></div>

    <table border="1" cellspacing="0" cellpadding="5">

        <tr>

            <td></td>

            <td><a href='zfile.php?path=<?=urlencode($pre_path) ?>'>..</a></td>

            <td></td>

        </tr>

        <?php foreach ($list as $r) { $t = filetype($r); ?>

            <tr>

                <td><?=$t?></td>

                <td><a target="<?=($t=='file'?'_blank':'')?>" href='zfile.php?path=<?=urlencode($cur_path) ?><?=DS.urlencode(basename($r))?>'><?=basename($r)?></a></td>

                <td><?=round(filesize($r)/1024)?>k</td>

            </tr>

        <?php } ?>

    </table>

</body>