Online PHP editor | perf for dUj8K

@ 2026-07-18T19:17:36Z

<?php
/*
* Fill in all five below and click the blue 'eval();' button.
* ------------------ */

$numberOfCase = 3;
$unhashedServerSeed = 'ec385c144f6ecc715adf3e96ccadda4245f4aeaec75fcd6240a95abe6c2b22f7';
$nonce = 1;
$clientSeed = '1';
$qty = 1;

/* ------------------ */

if ($numberOfCase < 0 || $unhashedServerSeed == '' || $nonce < 0 || $clientSeed == '' || $qty <= 0) {
    echo "Fill in details";
    return;
}

define('MAX_HEX_SEGMENTS', 6);
define('HEX_SEGMENT_SIZE', 2);
define('BASE_FOR_HEX_CONVERSION', 256);
define('HASH_TYPE', 'sha256');

function calculateDecimalValue(string $preResult): float
{
    $decimalValue = 0;
    for ($i = 0; $i < MAX_HEX_SEGMENTS; $i++) {
        $hexValue = substr($preResult, HEX_SEGMENT_SIZE * $i, HEX_SEGMENT_SIZE);
        $decimalValue += hexdec($hexValue) / pow(BASE_FOR_HEX_CONVERSION, $i + 1);
    }
    return $decimalValue;
}

function getProvablyFairResult(string $init, string $serverSeed, int $qty): array
{
    $preResult = hash_hmac(HASH_TYPE, $init, $serverSeed);
    $decimalValue = calculateDecimalValue($preResult);
    $result = (int) ($decimalValue * $qty) + 1;
    return [
        'preResult' => $preResult,
        'result' => $result,
    ];
}

$unhashedServerSeed = preg_replace( "/\r|\n/", "", $unhashedServerSeed);
$clientSeed = preg_replace( "/\r|\n/", "", $clientSeed);
$stringToHash = "$clientSeed-$numberOfCase-$nonce";

$result = getProvablyFairResult($stringToHash, $unhashedServerSeed, $qty);

echo "Result: {$result['result']}";

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
8.5.8	0.029	0.011	17.15
8.5.7	0.034	0.010	16.98
8.5.6	0.037	0.005	16.86
8.5.5	0.036	0.004	16.77
8.5.4	0.035	0.007	16.93
8.5.3	0.034	0.007	16.83
8.5.2	0.039	0.006	16.79
8.5.1	0.033	0.006	16.73
8.5.0	0.007	0.012	17.14
8.4.23	0.015	0.010	19.96
8.4.22	0.027	0.015	20.03
8.4.21	0.031	0.014	19.70
8.4.20	0.030	0.010	19.87
8.4.19	0.038	0.007	19.87
8.4.18	0.034	0.008	19.86
8.4.17	0.029	0.007	19.84
8.4.16	0.023	0.010	19.76
8.4.15	0.033	0.012	19.95
8.4.14	0.035	0.013	17.84
8.4.13	0.028	0.010	18.00
8.4.12	0.026	0.003	17.96
8.4.11	0.017	0.004	18.14
8.4.10	0.030	0.011	18.15
8.4.9	0.036	0.010	17.96
8.4.8	0.037	0.009	17.98
8.4.7	0.035	0.010	18.09
8.4.6	0.037	0.010	18.06
8.4.5	0.028	0.013	18.03
8.4.4	0.031	0.012	17.90
8.4.3	0.033	0.012	17.86
8.4.2	0.032	0.007	17.93
8.4.1	0.043	0.006	18.05
8.3.32	0.033	0.010	18.59
8.3.31	0.032	0.009	18.70
8.3.30	0.036	0.010	18.40
8.3.29	0.034	0.007	18.54
8.3.28	0.021	0.006	18.62
8.3.27	0.026	0.007	16.93
8.3.26	0.029	0.008	16.86
8.3.25	0.034	0.008	16.78
8.3.24	0.031	0.011	16.98
8.3.23	0.033	0.005	16.98
8.3.22	0.017	0.003	16.91
8.3.21	0.020	0.003	16.78
8.3.20	0.033	0.009	16.70
8.3.19	0.033	0.009	16.97
8.3.18	0.035	0.007	17.04
8.3.17	0.037	0.010	16.84
8.3.16	0.039	0.008	16.71
8.3.15	0.036	0.008	16.75
8.3.14	0.035	0.010	16.78
8.3.13	0.030	0.006	17.01
8.3.12	0.031	0.008	16.79
8.3.11	0.028	0.011	17.04
8.3.10	0.028	0.009	17.04
8.3.9	0.027	0.013	16.83
8.3.8	0.033	0.010	16.89
8.3.7	0.035	0.010	16.91
8.3.6	0.029	0.006	17.00
8.3.5	0.038	0.009	16.75
8.3.4	0.040	0.008	17.91
8.3.3	0.029	0.008	18.16
8.3.2	0.026	0.011	18.35
8.3.1	0.027	0.006	18.33
8.3.0	0.026	0.004	18.34
8.2.32	0.035	0.007	18.07
8.2.31	0.032	0.009	18.17

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