get 20 numbers from a bitcoin transaction hash

satoshi-picks.php

<?php
// get the sha512 hash of the txid and split it by 2
$pool  = str_split(hash_hmac('sha512', $txid, $DailySecretKey), 2); 
// Loop and get 20
for($N=array(),$i = 0; count($N) < 20 && $i < count($pool); $i++) {
    // base 10 that shit
    $n = hexdec($pool[$i]);

    // make sure it meets the standards
    if ($n > 80 || $n < 1) {
        // Overkill? maybe
        $array = str_split(hash('sha512', $pool[$i]), 2); 
        array_walk($array, function($v,$k) use(&$pool){
            // append to end of array we are pulling out
            // numbers from
            $pool[] = $v; 
        }); 
        continue;
    }   

    if (!in_array($n, $N)) {
        $N[] = $n; 
    }   
}   

var_dump($N); // satoshi picks =D