ID Generator

v1.5.0 2018-12-19 21:48 UTC


Build Status PHP 7.2+ PHP version

A library for generating IDs.

Object ID

If your Object ID is long enough, it can be generated on multiple systems, without worrying about a collision. Using time-based buckets gives us locality for each new ID.

The first half of the ID is a bucket. The bucket is the difference between two unix timestamps. The first timestamp is the beginning of the current year, and the second timestamp is when the method is called. This is more efficient than only using the current timestamp. We will end up with more buckets this way.

The second half of the ID uses the random_bytes function. It is then safely encoded using base 64. We strip away any characters that are unsafe for URLs.


The example below generates 5,000 Object IDs.


require 'vendor/autoload.php';

use Bulldog\id\ObjectId;

$id = new ObjectId;

for($i=0; $i<5000; $i++) {

Incremental ID

You can use multiple IDs to create a base64 encoded incremental ID. You may want to use the user's ID and another primary key from a relational database to create a unique incremental ID.


The example below will generate the same string each time.


require 'vendor/autoload.php';

use Bulldog\id\IncrementalId;

$id = new IncrementalId;

var_dump($id->create(4, 'dog', 9));
// Output: NAZG9nOQ

// Output: NAZG