SipHash-2-4 implementation written in PHP
With composer
composer require duzun/siphash
Copy src/siphash.php
to your project, then
require_once 'src/siphash.php';
use duzun\SipHash; // PHP >= 5.3.0
// 128-bit $key is a string of max 16 chars
// $message is any string you want to hash
$hash = SipHash::hash_2_4($key, $message); // eg. "6dd48df68066d1bd"