Hash::fromHex

[dimitre]

does it exist?

[phlisg]

It has been removed in latest commit. I tried reverting to an older commit but things went sideways, so I'm updating my whole db to generate bits hashes instead of hex hashes.

[nghuuquyen]

I got the same problem for my project. Please help it

[jenssegers]

I'll check it out!

[nghuuquyen]

Yes, thank you so much.
Currently for my project work, I temporary down the version to ^0.8.0 and everything work fine.

[richard-bridgeman]

Trying to use this project and I need to load a hash from the database to evaluate it. Is this going to be re-implemented any time soon?

[took]

@dimitre new Hash(new BigInteger($hex, 16)) should do the trick!

@jenssegers maybe we could refactor the constructor of Hash to accept a string $binaryValue like before, but if the parameter is an array, it may look like this ['fromHex'=>$hex] and the constructor does the new BigInteger($hex, 16) trick (also for "fromBit", and for completeness "fromInt")?

[richard-bridgeman]

No because in the latest version you don't have big integer either. In the end I downgraded to 0.8.0 like the other person. Sent from Outlook for Android<https://aka.ms/AAb9ysg>

…

________________________________ From: took ***@***.***> Sent: Monday, August 28, 2023 8:01:58 PM To: jenssegers/imagehash ***@***.***> Cc: Richard ***@***.***>; Comment ***@***.***> Subject: Re: [jenssegers/imagehash] Hash::fromHex (Issue #84) new Hash(new BigInteger($hex, 16)); should do the trick! — Reply to this email directly, view it on GitHub<#84 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AWWO64OEDCKRB7R7PCTCLALXXTTKNANCNFSM6AAAAAAWS32PN4>. You are receiving this because you commented.Message ID: ***@***.***>

[oleg-andreyev]

changing API in minor is a BC-break - not good.

---

UPD

<?php

namespace App\Helper;

class HashHelper
{
    public static function hashToBits(string $value): string
    {
        $value = hex2bin($value);

        $bits = '';
        $digits = unpack('J*', $value);
        foreach ($digits as $digit) {
            $bits .= sprintf('%064b', $digit);
        }

        return $bits;
    }
}

$hash = '0000000000000000082bfe0000000000';
$h1 = Hash::fromBits(HashHelper::hashToBits($s));
var_dump(str_pad($h1->toHex(), 32, 0, STR_PAD_LEFT) === $s);