[TOC] >[github](https://github.com/ramsey/uuid) ## 概述 1. PHP 7.2+ ## 安装 `composer require ramsey/uuid ` ## 使用 ``` use Ramsey\Uuid\Uuid; use Ramsey\Uuid\Exception\UnsatisfiedDependencyException; try { // Generate a version 1 (time-based) UUID object $uuid1 = Uuid::uuid1(); echo $uuid1->toString() . "\n"; // i.e. e4eaaaf2-d142-11e1-b3e4-080027620cdd // Generate a version 3 (name-based and hashed with MD5) UUID object $uuid3 = Uuid::uuid3(Uuid::NAMESPACE_DNS, 'php.net'); echo $uuid3->toString() . "\n"; // i.e. 11a38b9a-b3da-360f-9353-a5a725514269 // Generate a version 4 (random) UUID object $uuid4 = Uuid::uuid4(); echo $uuid4->toString() . "\n"; // i.e. 25769c6c-d34d-4bfe-ba98-e0ee856f3e7a // Generate a version 5 (name-based and hashed with SHA1) UUID object $uuid5 = Uuid::uuid5(Uuid::NAMESPACE_DNS, 'php.net'); echo $uuid5->toString() . "\n"; // i.e. c4a760a8-dbcf-5254-a0d9-6a4474bd1b62 } catch (UnsatisfiedDependencyException $e) { // Some dependency was not met. Either the method cannot be called on a // 32-bit system, or it can, but it relies on Moontoast\Math to be present. echo 'Caught exception: ' . $e->getMessage() . "\n"; } ```