GPG_Utility::B3 PHP Method

    static function B3($x)
    {
        return $x >> 0x18 & 0xff;
    }

 static function unpack_octets($packed)
 {
     $j = 0;
     $i = 0;
     $l = count($packed);
     $r = array_fill(0, $l * 4, 0);
     for ($j = 0; $j < $l; $j++) {
         $r[$i++] = GPG_Utility::B0($packed[$j]);
         $r[$i++] = GPG_Utility::B1($packed[$j]);
         $r[$i++] = GPG_Utility::B2($packed[$j]);
         $r[$i++] = GPG_Utility::B3($packed[$j]);
     }
     return $r;
 }