PHP SDK for Auth0 Authentication and Management APIs.

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Documentation

We also have tailored SDKs for Laravel, Symfony, and WordPress. If you are using one of these frameworks, use the tailored SDK for the best integration experience.

• Quickstarts
  • Application using Sessions (Stateful) - Demonstrates a traditional web application that uses sessions and supports logging in, logging out, and querying user profiles. The completed source code is also available.
  • API using Access Tokens (Stateless) - Demonstrates a backend API that authorizes endpoints using access tokens provided by a frontend client and returns JSON. The completed source code is also available.
• PHP Examples - Code samples for common scenarios.
• Documentation Hub - Learn more about integrating Auth0 with your application.

Getting Started

Requirements

• PHP 8.2+
• Composer
• PHP Extensions:
  • mbstring
• Dependencies:
  • PSR-18 HTTP Client implementation
  • PSR-17 HTTP Factory implementation
  • PSR-7 HTTP Messages implementation

Please review our support policy for details on our PHP version support.

Installation

Ensure you have the necessary dependencies installed, then add the SDK to your application using Composer:

composer require auth0/auth0-php

Configure Auth0

Create a Regular Web Application in the Auth0 Dashboard. Verify that the "Token Endpoint Authentication Method" is set to POST.

Next, configure the callback and logout URLs for your application under the "Application URIs" section of the "Settings" page:

• Allowed Callback URLs: The URL of your application where Auth0 will redirect to during authentication, e.g., http://localhost:3000/callback.
• Allowed Logout URLs: The URL of your application where Auth0 will redirect to after user logout, e.g., http://localhost:3000/login.

Note the Domain, Client ID, and Client Secret. These values will be used later.

Add login to your application

Create a SdkConfiguration instance configured with your Auth0 domain and Auth0 application client ID and secret. Generate a sufficiently long, random string for your cookieSecret using openssl rand -hex 32. Create a new Auth0 instance and pass your configuration to it.

useAuth0\SDK\Auth0;
useAuth0\SDK\Configuration\SdkConfiguration;
$configuration = newSdkConfiguration(
domain: 'Your Auth0 domain',
clientId: 'Your Auth0 application client ID',
clientSecret: 'Your Auth0 application client secret',
cookieSecret: 'Your generated string',
);
$auth0 = newAuth0($configuration);

Use the getCredentials() method to check if a user is authenticated.

// getCredentials() returns null if the user is not authenticated.$session = $auth0->getCredentials();
if (null === $session || $session->accessTokenExpired) {
// Redirect to Auth0 to authenticate the user.header('Location: ' . $auth0->login());
exit;
}

Complete the authentication flow and obtain the tokens by calling exchange():

if (null !== $auth0->getExchangeParameters()) {
$auth0->exchange();
}

Finally, you can use getCredentials()?->user to retrieve information about our authenticated user:

print_r($auth0->getCredentials()?->user);

That's it! You have successfully authenticated your first user with Auth0! From here, you may want to try following along with one of our quickstarts or browse through our examples for additional insight and guidance.

If you have questions, the Auth0 Community is a fantastic resource to ask questions and get help.

Authentication API

The Authentication API handles user authentication flows. Initialize it with your Auth0 configuration:

useAuth0\SDK\API\Authentication;
useAuth0\SDK\Configuration\SdkConfiguration;
$config = newSdkConfiguration(
domain: 'your-tenant.auth0.com',
clientId: 'YOUR_CLIENT_ID',
clientSecret: 'YOUR_CLIENT_SECRET',
redirectUri: 'http://localhost:3000/callback',
);
$auth = newAuthentication($config);

Common Operations

Warning

Never pass unsanitized user input into the $params argument of getLoginLink(), login(), or getLogoutLink(). Caller-supplied values such as redirect_uri are used to build the authorization request, so always source them from trusted, explicit values. The SDK ignores attempts to override client_id, response_type, and response_mode via $params.

// Get authorization URL for login$loginUrl = $auth->getLoginLink(state: 'random-state-string');
// Exchange authorization code for tokens$response = $auth->codeExchange(code: $_GET['code']);
// Get user profile with access token$userInfo = $auth->userInfo(accessToken: $accessToken);
// Refresh an access token$response = $auth->refreshToken(refreshToken: $refreshToken);
// Client credentials (M2M) authentication$response = $auth->clientCredentials();
// Exchange an external or custom token for Auth0 tokens (RFC 8693)$response = $auth->customTokenExchange(
subjectToken: 'external-token-value',
subjectTokenType: 'urn:acme:mcp-token',
);
// Get logout URL$logoutUrl = $auth->getLogoutLink(returnTo: 'http://localhost:3000');

See EXAMPLES.md for Custom Token Exchange, including session login and actor-token delegation.

Database Connection Operations

// Sign up a new user$response = $auth->dbConnectionsSignup(
email: 'user@example.com',
password: 'SecurePassword123!',
connection: 'Username-Password-Authentication',
);
// Request password change email$response = $auth->dbConnectionsChangePassword(
email: 'user@example.com',
connection: 'Username-Password-Authentication',
);

Management API Client

The ManagementClient wrapper provides a convenient way to interact with the Auth0 Management API with automatic token management. It wraps the generated Management client and handles authentication transparently - you get the same sub-client access (->users, ->roles, etc.) without managing tokens yourself.

Static Token

Use a pre-existing access token:

useAuth0\SDK\API\Management\Wrapper\ManagementClient;
useAuth0\SDK\API\Management\Wrapper\ManagementClientOptions;
$client = newManagementClient(newManagementClientOptions(
domain: 'your-tenant.auth0.com',
token: 'YOUR_MGMT_TOKEN',
));
$users = $client->users->list();

Client Credentials (M2M)

Provide client ID and secret to have the wrapper automatically fetch and refresh tokens via the OAuth 2.0 client credentials grant:

$client = newManagementClient(newManagementClientOptions(
domain: 'your-tenant.auth0.com',
clientId: 'YOUR_CLIENT_ID',
clientSecret: 'YOUR_CLIENT_SECRET',
));
// Tokens are fetched automatically on first API call and cached in memory.// Expired tokens are re-fetched transparently.$user = $client->users->get('auth0|123');

The audience defaults to https://{domain}/api/v2/ but can be overridden:

$client = newManagementClient(newManagementClientOptions(
domain: 'your-tenant.auth0.com',
clientId: 'YOUR_CLIENT_ID',
clientSecret: 'YOUR_CLIENT_SECRET',
audience: 'https://custom-audience.example.com/',
));

Token Caching (PSR-6)

By default, tokens are cached in-memory and are lost when the PHP process ends. To persist tokens across requests (avoiding a client credentials grant on every request), pass any PSR-6 cache implementation:

useSymfony\Component\Cache\Adapter\FilesystemAdapter;
$cache = newFilesystemAdapter(namespace: 'auth0', defaultLifetime: 0, directory: '/tmp/auth0-cache');
$client = newManagementClient(newManagementClientOptions(
domain: 'your-tenant.auth0.com',
clientId: 'YOUR_CLIENT_ID',
clientSecret: 'YOUR_CLIENT_SECRET',
tokenCache: $cache,
));
// First request fetches a token and stores it in the cache.// Subsequent requests (even in different PHP processes) reuse the cached token.$user = $client->users->get('auth0|123');

Any PSR-6 CacheItemPoolInterface implementation works - for example FilesystemAdapter, RedisAdapter, ApcuAdapter, or Memcached from symfony/cache. The token TTL is set automatically based on the expires_in value from Auth0.

Custom Token Provider

For full control over token acquisition, pass a callable that returns a token string:

$client = newManagementClient(newManagementClientOptions(
domain: 'your-tenant.auth0.com',
tokenProvider: function (): string {
// Fetch token from your own source (vault, database, etc.)returngetTokenFromVault();
},
));

Additional Options

ManagementClientOptions accepts several optional parameters:

Option	Type	Description
httpClient	ClientInterface	Custom PSR-18 HTTP client (e.g. Guzzle, Symfony HttpClient)
timeout	float	Request timeout in seconds
maxRetries	int	Maximum number of request retries
additionalHeaders	array<string, string>	Extra headers to include in requests
tokenCache	CacheItemPoolInterface	PSR-6 cache pool for persisting management tokens

Exception Handling

When the API returns a non-success status code (4xx or 5xx response), an exception will be thrown.

useAuth0\SDK\API\Management\Exceptions\Auth0ApiException;
useAuth0\SDK\API\Management\Exceptions\Auth0Exception;
try {
$response = $client->actions->create(...);
} catch (Auth0ApiException$e) {
echo'API Exception occurred: ' . $e->getMessage() . "\n";
echo'Status Code: ' . $e->getCode() . "\n";
echo'Response Body: ' . $e->getBody() . "\n";
// Optionally, rethrow the exception or handle accordingly.
}

Pagination

List endpoints return a Pager<T> which lets you loop over all items and the SDK will automatically make multiple HTTP requests for you.

$items = $client->actions->list();
foreach ($itemsas$item) {
var_dump($item);
}

You can also iterate page-by-page:

foreach ($items->getPages() as$page) {
foreach ($page->getItems() as$pageItem) {
var_dump($pageItem);
}
}

Sending Explicit Nulls

When updating resources with PATCH endpoints, the SDK distinguishes between omitting a field (don't change it) and sending null (clear it). By default, null properties are omitted from the request body. To explicitly send a null value, use the setter method instead of passing it through the constructor:

useAuth0\SDK\API\Management\Users\Requests\UpdateUserRequestContent;
// Constructor only: null properties are OMITTED from the request.// This sends {"name": "Jane"} - email is not touched.$request = newUpdateUserRequestContent([
'name' => 'Jane',
'nickname' => null, // Omitted - nickname is not changed
]);
// Setter: null properties are INCLUDED in the request.// This sends {"name": "Jane", "nickname": null} - nickname is cleared.$request = newUpdateUserRequestContent(['name' => 'Jane']);
$request->setNickname(null);

Setters mark the property as explicitly set, so the serializer includes it even when the value is null. This works for any property on any request object, and setters can be chained:

$request = (newUpdateUserRequestContent())
->setName('Jane')
->setNickname(null) // Will send null - clears nickname
->setUserMetadata(null); // Will send null - clears user_metadata

Advanced

Custom Client

This SDK works with any PSR-18 HTTP client. By default, the SDK auto-discovers an installed client using HTTPlug Discovery. You can pass your own client that implements Psr\Http\Client\ClientInterface:

useAuth0\SDK\API\Management\Management;
// Using Guzzle$customClient = new \GuzzleHttp\Client(['timeout' => 5.0]);
$client = newManagement(token: '<token>', options: [
'client' => $customClient,
]);
// Using Symfony HttpClient$customClient = new \Symfony\Component\HttpClient\Psr18Client(
\Symfony\Component\HttpClient\HttpClient::create(['timeout' => 5.0])
);
$client = newManagement(token: '<token>', options: [
'client' => $customClient,
]);

The same httpClient option is available on ManagementClientOptions for the wrapper:

useAuth0\SDK\API\Management\Wrapper\ManagementClient;
useAuth0\SDK\API\Management\Wrapper\ManagementClientOptions;
$client = newManagementClient(newManagementClientOptions(
domain: 'your-tenant.auth0.com',
clientId: 'YOUR_CLIENT_ID',
clientSecret: 'YOUR_CLIENT_SECRET',
httpClient: $customClient,
));

Retries

The SDK is instrumented with automatic retries with exponential backoff. A request will be retried as long as the request is deemed retryable and the number of retry attempts has not grown larger than the configured retry limit (default: 2).

A request is deemed retryable when any of the following HTTP status codes is returned:

• 408 (Timeout)
• 429 (Too Many Requests)
• 5XX (Internal Server Errors)

Use the maxRetries request option to configure this behavior.

$response = $client->actions->create(
...,
options: [
'maxRetries' => 0// Override maxRetries at the request level
]
);

Timeouts

The SDK defaults to a 30 second timeout. Use the timeout option to configure this behavior.

$response = $client->actions->create(
...,
options: [
'timeout' => 3.0// Override timeout to 3 seconds
]
);

Input from Untrusted Sources

If your application accepts input from untrusted sources (such as query parameters from HTTP requests) please ensure you are following best practices for data validation and sanitization. It is your application's responsibility to ensure any data provided to the SDK is valid and safe. For more information, see the OWASP Data Validation Cheat Sheet.

API Reference

• API Reference

Support Policy

Our support lifecycle mirrors the PHP release support schedule.

SDK Version	PHP Version	Support Ends
9	8.4	Dec 2028
	8.3	Dec 2027
	8.2	Dec 2026

We drop support for PHP versions when they reach end-of-life and cease receiving security fixes from the PHP Foundation. Please ensure your environment remains up to date so you can continue receiving updates for PHP and this SDK.

Feedback

Contributing

We appreciate feedback and contribution to this repo! Before you get started, please see the following:

• Contribution Guide
• Auth0's General Contribution Guidelines
• Auth0's Code of Conduct Guidelines

Note: The Management API client in this SDK is generated programmatically using Fern. Contributions to the Management API layer should be directed to the generation configuration rather than the generated source files. The Authentication API and all other SDK components are hand-written and accept direct contributions.

Raise an issue

To provide feedback or report a bug, please raise an issue on our issue tracker.

Vulnerability Reporting

Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.

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Auth0 is an easy-to-implement, adaptable authentication and authorization platform.
To learn more, check out "Why Auth0?"

This project is licensed under the MIT license. See the LICENSE file for more info.