Online PHP editor | refs for riiil

@ 2022-12-13T13:41:03Z

<?php

function bcmul_hex($h1, $h2) {
    $dec = bcmul($h1, $h2);
    $hex = '';
    do {    
        $last = bcmod($dec, 16);
        $hex = dechex($last).$hex;
        $dec = bcdiv(bcsub($dec, $last), 16);
    } while($dec>0);
    return $hex;
}

echo bcmul_hex(0xB5365D09, 0xDEBC252C);