base64转GB2312 php源码

<?php header('Content-Type: text/html; charset=gb2312'); $txt1 = stripslashes(trim( @$_POST['text1'])); $button = @$_POST['button']; $down = @trim($_GET['down']); if ($down==1) { header("Content-type: command"); header("Content-Disposition: attachment; filename=base64_decode.txt"); $contents = file_get_contents(basename($_SERVER['PHP_SELF'])); echo $contents; exit; } ?>