UUID Any Version (v1–v8) Regex for PHP

What this pattern does

This page provides a well-structured, multi-part regular expression for matching uuid any version (v1–v8), ported and verified for PHP. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your PHP project — whether you're validating in a Laravel validator, a WordPress plugin, or a standalone PHP script.

Php Implementation

<?php
// UUID Any Version (v1–v8)
// ReDoS-safe | RegexVault — Web & Network > Misc

define('UUID_ANY_VERSION_V1V8_PATTERN', '/^[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/');

function validate_uuid_any_version_v1v8(string $input): bool {
    return (bool) preg_match(UUID_ANY_VERSION_V1V8_PATTERN, $input);
}

// Example
var_dump(validate_uuid_any_version_v1v8("550e8400-e29b-41d4-a716-446655440000")); // bool(true)

Test Cases

When to use this pattern

This pattern is drawn from the Web & Network > Misc category and carries a ReDoS-safe certification. That matters for PHP developers because especially relevant in PHP where PCRE backtracking limits can trigger silent failures on malicious input. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Versions 6, 7, and 8 are defined in RFC 9562 (2024). Version 0 and 9+ are not valid. The nil UUID (all zeros) does not have a valid version number.