Generate UUIDs in PHP

<?php
require 'vendor/autoload.php';

use Ramsey\Uuid\Uuid;

// Generate UUID v4 (random)
$uuid4 = Uuid::uuid4();
echo $uuid4->toString();  // Example: 3d6f9e64-7d8a-4c3e-8f2b-1a4e5c6d7e8f

// Generate UUID v7 (timestamp-ordered, recommended for databases)
$uuid7 = Uuid::uuid7();
echo $uuid7->toString();  // Example: 018e5e1a-7b2c-7d4f-9a3e-8c7f6e5d4c3b

// Generate UUID v5 (namespaced)
$namespace = Uuid::NAMESPACE_DNS;
$name = 'example.com';
$uuid5 = Uuid::uuid5($namespace, $name);
echo $uuid5->toString();  // Always same: cfbff0d1-9375-5685-968c-48ce8b15ae17

// Parse and validate UUID
$uuidString = '3d6f9e64-7d8a-4c3e-8f2b-1a4e5c6d7e8f';
if (Uuid::isValid($uuidString)) {
    $uuid = Uuid::fromString($uuidString);
    echo $uuid->getVersion();  // Outputs: 4
}