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@ 2019-06-14T15:31:38Z

<?php
$salt = "fe5e5c41b";
$roll_id = 2;

for($i = 0; $i < 1000; $i++) {
    echo generateRandomNumber(md5(uniqid(rand(), true)), $salt, 0) . "\r\n";
}

function generateRandomNumber(string $seed, string $salt, int $roll): int
{
    $roll_hash = hash("sha256", $seed . "-" . $salt . "-" . $roll);
    $roll_hash_first16 = substr($roll_hash, 0, 16);
    return abs(hexdec($roll_hash_first16) % 37);  
}

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Output
Performance
VLD
References
Branches

substr: documentation ( source)
abs: documentation ( source)
uniqid: documentation ( source)
hash: documentation ( source)
hexdec: documentation ( source)
rand: documentation ( source)
md5: documentation ( source)

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22.79 ms | 410 KiB | 5 Q