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Example code of grantholle/scru64

Informations about the package scru64

SCRU64 for PHP

Latest Version on Packagist Tests Total Downloads

A PHP implementation of SCRU64: Sortable, Clock-based, Realm-specifically Unique identifiers.

Uniqueness depends on each generator being given a unique node ID. If you can't coordinate node IDs, use SCRU128 instead.

Installation

Requires PHP 8.4+ on a 64-bit platform.

Usage

Global generator

Set SCRU64_NODE_SPEC in the environment and call the static facade:

The environment variable is only needed by the facade. If you'd rather configure it in code (e.g. from your app's config during bootstrap), set the generator explicitly and the env var is ignored:

Scru64::generate() throws a RuntimeException if neither is provided.

Node spec

A node spec is <node_id>/<node_id_size>, where node_id_size is 1–23 bits:

Spec Meaning
42/8 Decimal node ID 42 using 8 bits (16-bit counter)
0xb00/12 Hex node ID using 12 bits (12-bit counter)
0u2r85hm2pt3/16 Continue after a previously generated ID, using 16 node bits

Fewer node bits → more IDs per 256 ms tick per node. More node bits → more nodes.

Explicit generator

generate() never blocks. When the counter overflows within a tick, the timestamp is advanced by one. Clock rollbacks of up to ~10 seconds are absorbed; a larger rollback throws a RuntimeException.

Working with IDs

Store $id->value in a BIGINT column or (string) $id in a CHAR(12) column; both sort chronologically.

Testing

Changelog

Please see CHANGELOG for more information on what has changed recently.

Security Vulnerabilities

Please review our security policy on how to report security vulnerabilities.

Credits

License

The MIT License (MIT). Please see License File for more information.

All versions of scru64 with dependencies

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Requires php Version ^8.4
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