PHP kodu tersten işleme (decode)

$seed = "64 basamaklı (abcdef0123456789) harf ve rakamları kullanılarak oluşturulmuş bir seed"; 
  $lotto = "0209253738"; 
   
  $round0 = "124000"; 
  $hash0 = hash("sha256",$seed."-".$lotto."-".$round0); 
  $sayi0 = hexdec(substr($hash0,0,8)) % 15; 
  echo "$round0 = $sayi0<br>"; 
   
  $round1 = "124001"; 
  $hash1 = hash("sha256",$seed."-".$lotto."-".$round1); 
  $sayi1 = hexdec(substr($hash1,0,8)) % 15; 
  echo "$round1 = $sayi1<br>"; 
   
  $round2 = "124002"; 
  $hash2 = hash("sha256",$seed."-".$lotto."-".$round2); 
  $sayi2 = hexdec(substr($hash2,0,8)) % 15; 
  echo "$round2 = $sayi2<br>"; 
   
  $round3 = "124003"; 
  $hash3 = hash("sha256",$seed."-".$lotto."-".$round3); 
  $sayi3 = hexdec(substr($hash3,0,8)) % 15; 
  echo "$round3 = $sayi3<br>"; 
   
  $round4 = "124004"; 
  $hash4 = hash("sha256",$seed."-".$lotto."-".$round4); 
  $sayi4 = hexdec(substr($hash4,0,8)) % 15; 
  echo "$round4 = $sayi4<br>"; 
   
  $round5 = "124005"; 
  $hash5 = hash("sha256",$seed."-".$lotto."-".$round5); 
  $sayi5 = hexdec(substr($hash5,0,8)) % 15; 
  echo "$round5 = $sayi5<br>"; 
   
  $round6 = "124006"; 
  $hash6 = hash("sha256",$seed."-".$lotto."-".$round6); 
  $sayi6 = hexdec(substr($hash6,0,8)) % 15; 
  echo "$round6 = $sayi6<br>"; 
   
  $round7 = "124007"; 
  $hash7 = hash("sha256",$seed."-".$lotto."-".$round7); 
  $sayi7 = hexdec(substr($hash7,0,8)) % 15; 
  echo "$round7 = $sayi7<br>"; 
   
  $round8 = "124008"; 
  $hash8 = hash("sha256",$seed."-".$lotto."-".$round8); 
  $sayi8 = hexdec(substr($hash8,0,8)) % 15; 
  echo "$round8 = $sayi8<br>"; 
   
  $round9 = "124009"; 
  $hash9 = hash("sha256",$seed."-".$lotto."-".$round9); 
  $sayi9 = hexdec(substr($hash9,0,8)) % 15; 
  echo "$round9 = $sayi9<br>";

124000 = 14 
  124001 = 12 
  124002 = 5 
  124003 = 14 
  124004 = 14 
  124005 = 5 
  124006 = 3 
  124007 = 1 
  124008 = 11 
  124009 = 6