User management

The Firebase Admin SDK for PHP provides an API for managing your Firebase users with elevated privileges. The admin user management API gives you the ability to programmatically retrieve, create, update, and delete users without requiring a user’s existing credentials and without worrying about client-side rate limiting.

use Kreait\Firebase\Factory;
use Kreait\Firebase\ServiceAccount;

$serviceAccount = ServiceAccount::fromJsonFile(__DIR__.'/google-service-account.json');

$firebase = (new Factory)

$auth = $firebase->getAuth();

User Records

UserRecord s returned by methods from the Kreait\Firebase\Auth class have the following signature:

    "uid": "jEazVdPDhqec0tnEOG7vM5wbDyU2",
    "email": "user@domain.tld",
    "emailVerified": true,
    "displayName": null,
    "photoUrl": null,
    "phoneNumber": null,
    "disabled": false,
    "metadata": {
        "createdAt": "2018-02-14T15:41:32+00:00",
        "lastLoginAt": "2018-02-14T15:41:32+00:00"
    "providerData": [
            "uid": "user@domain.tld",
            "displayName": null,
            "email": "user@domain.tld",
            "photoUrl": null,
            "providerId": "password",
            "phoneNumber": null
    "passwordHash": "UkVEQUNURUQ=",
    "customClaims": null,
    "tokensValidAfterTime": "2018-02-14T15:41:32+00:00"

List users

To enhance performance and prevent memory issues when retrieving a huge amount of users, this methods returns a Generator.

$users = $auth->listUsers($defaultMaxResults = 1000, $defaultBatchSize = 1000);

foreach ($users as $user) {
    /** @var \Kreait\Firebase\Auth\UserRecord $user */
    // ...
// or
array_map(function (\Kreait\Firebase\Auth\UserRecord $user) {
    // ...
}, iterator_to_array($users));

Get information about a specific user

$user = $auth->getUser('some-uid');

Create a user

The Admin SDK provides a method that allows you to create a new Firebase Authentication user. This method accepts an object containing the profile information to include in the newly created user account:

$userProperties = [
    'email' => '',
    'emailVerified' => false,
    'phoneNumber' => '+15555550100',
    'password' => 'secretPassword',
    'displayName' => 'John Doe',
    'photoUrl' => '',
    'disabled' => false,

$createdUser = $auth->createUser($userProperties);

// This is equivalent to:

$request = \Kreait\Auth\Request\CreateUser::new()
    ->withDisplayName('John Doe')

$createdUser = $auth->createUser($request);

By default, Firebase Authentication will generate a random uid for the new user. If you instead want to specify your own uid for the new user, you can include in the properties passed to the user creation method:

$properties = [
    'uid' => 'some-uid',
    // other properties

$request = \Kreait\Auth\Request\CreateUser::new()
    // with other properties

Any combination of the following properties can be provided:

Property Type Description
uid string The uid to assign to the newly created user. Must be a string between 1 and 128 characters long, inclusive. If not provided, a random uid will be automatically generated.
email string The user’s primary email. Must be a valid email address.
emailVerified boolean Whether or not the user’s primary email is verified. If not provided, the default is false.
phoneNumber string The user’s primary phone number. Must be a valid E.164 spec compliant phone number.
password string The user’s raw, unhashed password. Must be at least six characters long.
displayName string The users’ display name.
photoURL string The user’s photo URL.
disabled boolean Whether or not the user is disabled. true for disabled; false for enabled. If not provided, the default is false.


All of the above properties are optional. If a certain property is not specified, the value for that property will be empty unless a default is mentioned in the above table.


If you provide none of the properties, an anonymous user will be created.

Update a user

Updating a user works exactly as creating a new user, except that the uid property is required:

$uid = 'some-uid';
$properties = [
    'displayName' => 'New display name'

$updatedUser = $auth->updateUser($uid, $properties);

$request = \Kreait\Auth\Request\UpdateUser::new()
    ->withDisplayName('New display name');

$updatedUser = $auth->updateUser($uid, $request);

In addition to the properties of a create request, the following properties can be provided:

Property Type Description
deletePhotoUrl boolean Whether or not to delete the user’s photo.
deleteDisplayName boolean Whether or not to delete the user’s display name.
deletePhoneNumber boolean Whether or not to delete the user’s phone number.
deleteProvider string|array One or more identity providers to delete.
customAttributes array A list of custom attributes which will be available in a User’s ID token.

Change a user’s password

$uid = 'some-uid';

$updatedUser = $auth->changeUserPassword($uid, 'new password');

Change a user’s email

$uid = 'some-uid';

$updatedUser = $auth->changeUserEmail($uid, 'user@domain.tld');

Disable a user

$uid = 'some-uid';

$updatedUser = $auth->disableUser($uid);

Enable a user

$uid = 'some-uid';

$updatedUser = $auth->enableUser($uid);

Set custom attributes

$uid = 'some-uid';
$customAttributes = [
    'admin' => true,
    'groupId' => '1234'

$updatedUser = $auth->setCustomUserAttributes($uid, $customAttributes);


Learn more about custom attributes/claims in the official documentation: Control Access with Custom Claims and Security Rules

Delete a user

$uid = 'some-uid';


Verify a password


This method has the side effect of changing the last login timestamp of the given user. The recommended way to authenticate users in a client/server environment is to use a Firebase Client SDK to authenticate the user and to send an ID Token generated by the client back to the server.

try {
    $user = $auth->verifyPassword($email, $password);
} catch (Kreait\Firebase\Exception\Auth\InvalidPassword $e) {
    echo $e->getMessage();

Verify an email address

Unless a user verifies the email address assigned to them, their email address will be markes as unverified.

You can send a verification email to a user with the following method:


// The method has an optional second parameter to specify where the user should be redirected
// to after they have have verified their email address
$auth->sendPasswordResetEmail($uid, 'https//');

Send a password reset email

You can send an email allowing a user to reset their password with the following method:


// The method has an optional second parameter to specify where the user should be redirected
// to after they have have reset their password
$auth->sendPasswordResetEmail('user@domain.tld', 'https//');

Invalidate user sessions [1]

This will revoke all sessions for a specified user and disable any new ID tokens for existing sessions from getting minted. Existing ID tokens may remain active until their natural expiration (one hour). To verify that ID tokens are revoked, use Auth::verifyIdToken() with the second parameter set to true.

If the check fails, a RevokedIdToken exception will be thrown.

use Kreait\Firebase\Exception\Auth\RevokedIdToken;

$idTokenString = '...';

$verifiedIdToken = $firebase->getAuth()->verifyIdToken($idTokenString);

$uid = $verifiedIdToken->getClaim('sub');


try {
    $verifiedIdToken = $firebase->getAuth()->verifyIdToken($idTokenString, true);
} catch (RevokedIdToken $e) {
    echo $e->getMessage();


Because Firebase ID tokens are stateless JWTs, you can determine a token has been revoked only by requesting the token’s status from the Firebase Authentication backend. For this reason, performing this check on your server is an expensive operation, requiring an extra network round trip. You can avoid making this network request by setting up Firebase Rules that check for revocation rather than using the Admin SDK to make the check.

For more information, please visit Google: Detect ID token revocation in Database Rules


[1]Google: Revoke refresh tokens