<?php
    $aaa="\xAC\xF1\xC2\xE1";
    $bbb="\x82\x35\x5A\xAE";
    $ccc="\xFA\x39\x20\x4D";

    $ddd = $aaa.$bbb.$ccc;


    $header= "\x00".substr($ddd,0,2);
    echo $header;
    echo "\n";

?>