Uncaught Error: Call to undefined method Kreait - php

Question

I just created php web server and connected it to firebase. when I tried authentication, Sign up works just fine. but the problem is in Sign in. it keeps getting this error:
Fatal error: Uncaught Error: Call to undefined method Kreait\Firebase\Auth::signInWithEmailAndPassword() in /Applications/XAMPP/xamppfiles/htdocs/firebase_series/authActions.php:24 Stack trace: #0 {main} thrown in /Applications/XAMPP/xamppfiles/htdocs/firebase_series/authActions.php on line 24
here my authentication code:
<?php
include("includes/db.php");
if(isset($_POST['signup']))
{
$email = $_POST['emailSignup'];
$pass = $_POST['passSignup'];
$auth = $firebase->getAuth();
$user = $auth->createUserWithEmailAndPassword($email,$pass);
header("Location:index.php");
}
else
{
$email = $_POST['emailSignin'];
$pass = $_POST['passSignin'];
$auth = $firebase->getAuth();
$user = $auth->getUserWithEmailAndPassword($email,$pass);
if($user)
{
session_start();
$_SESSION['user'] = true;
header("Location:home.php");
}
}
?>
and here's my database connection code:
<?php
require __DIR__.'/vendor/autoload.php';
use Kreait\Firebase\Factory;
use Kreait\Firebase\ServiceAccount;
use Kreait\Firebase\Auth;
// This assumes that you have placed the Firebase credentials in the same directory
// as this PHP file.
$serviceAccount = ServiceAccount::fromJsonFile(__DIR__.'/google-service-account.json');
$apiKey = 'AIzaSyCHULFKW6Kl7FXZc3ZUTYL8fq0f90-kAJ0';
$firebase = (new Factory)
->withServiceAccount($serviceAccount, $apiKey)
// The following line is optional if the project id in your credentials file
// is identical to the subdomain of your Firebase project. If you need it,
// make sure to replace the URL with the URL of your project.
->withDatabaseUri('https://phpserver-f35e3.firebaseio.com/')
->create();
$database = $firebase->getDatabase();
?>

Answer 1

👋 I'm the maintainer of the SDK (kreait/firebase-php) you're using :)
Your error says
Call to undefined method Kreait\Firebase\Auth::signInWithEmailAndPassword()
but I don't actually see this method called in your code. A method called signInWithEmailAndPassword() doesn't exist as well, and you're using methods to initialize the SDK that have been deprecated for quite some time now - please make sure to be on the latest release of the SDK (4.40 at the time of this comment).
Once you have, you will have access to the Auth::verifyPassword($email, $password) method.
Your code could then look like this:
<?php
// includes/db.php
require __DIR__.'/vendor/autoload.php';
use Kreait\Firebase\Factory;
$factory = (new Factory())->withServiceAccount(__DIR__.'/google-service-account.json');
$auth = $factory->createAuth();
// no closing "?>"
<?php
include("includes/db.php");
// Have a look at https://www.php.net/filter_input to filter user input
if (isset($_POST['signup'])) {
$email = $_POST['emailSignup'];
$pass = $_POST['passSignup'];
$user = $auth->createUserWithEmailAndPassword($email,$pass);
header("Location:index.php");
exit;
}
$email = $_POST['emailSignin'];
$pass = $_POST['passSignin'];
if ($email && $pass && $user = $auth->verifyPassword($email, $pass)) {
session_start();
$_SESSION['firebase_user_id'] = $user->id;
header("Location:home.php");
exit;
}
echo "Authentication failed";
If you have further questions concerning the SDK, I'd like to invite you the Discord community dedicated to the SDK.