vanillauuid/uuid.php

<?php
/* VanillaUUID v1.1 by abbieoverflight.
 * Licenced under the EUPLv1.2.
 * https://git.colean.cc/threeoh6000/vanillauuid */

$uuidNamespaceDNS = "6ba7b8109dad11d180b400c04fd430c8";
$uuidNamespaceURL = "6ba7b8119dad11d180b400c04fd430c8";
$uuidNamespaceOID = "6ba7b8129dad11d180b400c04fd430c8";
$uuidNamespaceX500 = "6ba7b8149dad11d180b400c04fd430c8";

function randomLongHex($bits = 128) {
	$byt = random_bytes($bits/8);
	return bin2hex($byt);
}

function genUuid3($namespace, $name) {
	$cleanedNamespace = preg_replace("/[^a-f0-9]/", '', strtolower($namespace));
	$hash = md5(pack("H*", $cleanedNamespace) . $name);

	$template = $hash;
	$canonicalVariant = substr($hash, 16, 1);
	$mathVariant = hexdec($canonicalVariant);
	$mathVariant = $mathVariant & 0b0011;
	$mathVariant = $mathVariant + 0b1000;

	$buildup = substr($template, 0, 8) . "-" . substr($template, 8, 4) . "-3" . substr($template, 13, 3) . "-" . dechex($mathVariant) . substr($template, 17, 3) . "-" . substr($template, 20, 12);

	return $buildup;
}

function genUuid4() {
	$template = randomLongHex();
	$canonicalVariant = substr($template, 16, 1);
	$mathVariant = hexdec($canonicalVariant);
	$mathVariant = $mathVariant & 0b0011;
	$mathVariant = $mathVariant + 0b1000;

	$buildup = substr($template, 0, 8) . "-" . substr($template, 8, 4) . "-4" . substr($template, 13, 3) . "-" . dechex($mathVariant) . substr($template, 17, 3) . "-" . substr($template, 20, 12);

	return $buildup;
}

function genUuid5($namespace, $name) {
	$cleanedNamespace = preg_replace("/[^a-f0-9]/", '', strtolower($namespace));
	$hash = sha1(pack("H*", $cleanedNamespace) . $name);

	$template = $hash;
	$canonicalVariant = substr($hash, 16, 1);
	$mathVariant = hexdec($canonicalVariant);
	$mathVariant = $mathVariant & 0b0011;
	$mathVariant = $mathVariant + 0b1000;

	$buildup = substr($template, 0, 8) . "-" . substr($template, 8, 4) . "-5" . substr($template, 13, 3) . "-" . dechex($mathVariant) . substr($template, 17, 3) . "-" . substr($template, 20, 12);

	return $buildup;
}

function genUuid7($milliseconds = NULL) {
	if($milliseconds == NULL) {
		$milliseconds = round(microtime(true) * 1000);
	}
	$milliseconds = dechex($milliseconds);
	while(strlen($milliseconds) < 12) {
		$milliseconds = "0" . $milliseconds;
	}
	$template = randomLongHex(74);
	return substr($milliseconds, -12, 8) . "-" .substr($milliseconds,-4,4) . "-7" . substr($template, 0, 3) . "-" . genVariantBit() . substr($template, 4, 3) . "-" . substr($template, 7, 12);
}

function genUuid8($data) {
	$hex = bin2hex($data);
	while(strlen($hex) < 32) {
		$hex = $hex . "0";
	}
	$template = $hex;
	$canonicalVariant = substr($hex, 16, 1);
	$mathVariant = hexdec($canonicalVariant);
	$mathVariant = $mathVariant & 0b0011;
	$mathVariant = $mathVariant + 0b1000;

	$buildup = substr($template, 0, 8) . "-" . substr($template, 8, 4) . "-8" . substr($template, 13, 3) . "-" . dechex($mathVariant) . substr($template, 17, 3) . "-" . substr($template, 20, 12);

	return $buildup;
}

function genSha256Uuid($namespace, $name){
	$cleanedNamespace = preg_replace("/[^a-f0-9]/", '', strtolower($namespace));
	return genUuid8(hash("sha256", pack("H*", $cleanedNamespace) . $name, true));
}

function genVariantBit() {
	$ri = random_int(0b1000, 0b1011);
	$encoded_byt = dechex((int)$ri);
	return $encoded_byt;
}

function nilUuid() {
	return "00000000-0000-0000-0000-000000000000";
}

function omniUuid() {
	return "FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF";
}
?>