add support for a load of UUID versions

README.md

@@ -2,4 +2,9 @@
 UUID generation in PHP without the Composer fuss. This is a small library for generating UUIDs without having to use a PHP package manager like Composer, it's easy to use and integrates without any fuss.
 
 ## Supported UUIDs
+* UUIDv3
 * UUIDv4
+* UUIDv5
+* UUIDv7
+* UUIDv8 (arbitrary binary data)
+* custom SHA-256 UUID (similar to UUIDv3/5)

uuid.php

@@ -1,22 +1,99 @@
 <?php
-/* VanillaUUID v1.0.1 by abbieoverflight.
+/* VanillaUUID v1.1 by abbieoverflight.
  * Licenced under the EUPLv1.2.
  * https://git.colean.cc/threeoh6000/vanillauuid */
-function randomLongHex() {
+
-	$byt = random_bytes(64);
+$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;
 
-	$ri = random_int(0b1000, 0b1011);
+	$buildup = substr($template, 0, 8) . "-" . substr($template, 8, 4) . "-4" . substr($template, 13, 3) . "-" . dechex($mathVariant) . substr($template, 17, 3) . "-" . substr($template, 20, 12);
-	$encoded_byt = dechex((int)$ri);
-	$buildup = substr($template, 0, 8) . "-" . substr($template, 8, 4) . "-4" . substr($template, 13, 3) . "-" . $encoded_byt . substr($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";
 }