在項目開發過程中經常會遇到需要唯一標識碼的功能，風信建站laravel開發項目使用ramsey/uuid包進行唯一識別碼的應用，分享經驗如下：
github項目地址：https://github.com/ramsey/uuid
安裝軟件包：
composer require ramsey/uuid
安裝過程如下：
Using version ^3.8 for ramsey/uuid
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Writing lock file
Generating optimized autoload files
> Illuminate\Foundation\ComposerScripts::postAutoloadDump
> @php artisan package:discover --ansi
Discovered Package: [32mbeyondcode/laravel-dump-server[39m
Discovered Package: [32mfideloper/proxy[39m
Discovered Package: [32mintervention/image[39m
Discovered Package: [32mjenssegers/agent[39m
Discovered Package: [32mlaravel/tinker[39m
Discovered Package: [32mmews/captcha[39m
Discovered Package: [32mnesbot/carbon[39m
Discovered Package: [32mnunomaduro/collision[39m
[32mPackage manifest generated successfully.[39m
完成之后，我們在項目的控制器中進行應用
use Ramsey\Uuid\Uuid;
$data = Uuid::uuid4();
$appid = $data->getHex();
dd($appid);
獲得結果如下：
"81b6c500e42d43d0a77a99bb7d3ab8a5"
官方示例代碼：
require 'vendor/autoload.php';
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";
}
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