Munix : A Unique ID Generator

A unique random id generator that produces unique signed 64 bit integers without the need for a dedicated id server. The generated id's can be used as unique identifiers for objects. Collisions are guaranteed not to occur. This was built to run on one or several machines that accept multiple requests per second.

Install

composer install munix/munix

Requirements

Munix requires sqlite to be installed and enabled in php.ini. A small sqlite db it used to track number sequences within milliseconds of each other to prevent collisions. Yes, it's small. It just contains one table, one column, and one row (1 x 1).

Usage

To get an id, you only need to call one method, Munix\Munix::nextId(int $customId).

The only thing needed is a custom number from 0 (inclusive) to 1023 (inclusive). For a single project, any number in that range will suffice. However, if it's a distributed system, each machine will need a different number, to avoid collisions.

If no custom id is supplied, the default value of 0 is used.

<?php

use Munix\Munix;

// Using a custom id of 5
$id = Munix::nextId(5);

echo $id;

Will give an output similar to

85164824987754496

To avoid passing the custom id each time you need an id, set one permanently by calling Munix\Munix::setCustomId(int $customId).

<?php

Munix::setCustomId(2);


Munix::nextId();

Munix::nextId();

TLDR;

Just call the nextId method whenever you need a unique Id.

Epoch

You can specify an epoch, in milliseconds by calling Munix\Munix::setEpoch(int $timestampInMilliseconds). The default epoch is 1640991600000, Jan 1st, 2022.

<?php

Munix::setEpoch(1640991600000);
Munix::setCustomId(1);

// Generate all you want
Munix::nextId();

Munix::nextId();

Dissection

To dissect any id generated by munix,

<?php

$id = Munix::nextId();

$object = new MunixId($id);

var_dump($object)

Or Even better

<?php

$object = Munix::nextIdAsObject();

var_dump($object)

The epoch should only be set once at the beginning of a project.

Contact

Twitter: @phrenotyper

Email: paul.contrib@gmail.com