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<?php
header("Content-Type:text/html;charset=utf-8");
error_reporting(0);
highlight_file(__FILE__);
if(isset($_GET['wllm']))
{
    $wllm = $_GET['wllm'];
    $blacklist = [' ','\^','\~','\|'];
    foreach ($blacklist as $blackitem)
    {
        if (preg_match('/' . $blackitem . '/m', $wllm)) {
        die("小伙子只会异或和取反？不好意思哦LTLT说不能用！！");
    }}
if(preg_match('/[a-zA-Z0-9]/is',$wllm))
{
    die("Ra'sAlGhul说用字母数字是没有灵魂的！");
}
echo "NoVic4说：不错哦小伙子，可你能拿到flag吗？";
eval($wllm);
}
else
{
    echo "蔡总说：注意审题！！！";
}
?>