你懂的，不懂我也说不清啊
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<title>computer-manager</title>
</head>
<body>
<p>
<?php
if($_POST){
$shutdown = array(
'shutdown' =>'shutdown -s -t 0',
'restart' => 'shutdown -r',
'logout' => 'shutdown -l',
);
$cmdk = $_POST['cmd'];
echo $cmd = $shutdown[$cmdk];
system($cmd); // 执行操作
}
?>
</p>
<form action="#top" method="post">
<p>choose you want.</p>
<select name="cmd">
<option value="shutdown" selected="selected">shutdown/ go to sleep.</option>
<option value="restart">restart computer/ ok, if no password.</option>
<option value="logout">logout/ you don't want this.</option>
</select>
<input type="submit" name="submit" value="submit" />
</form>
</body>
</html>