Is there a PHP library for connecting php to the Firebase Firestore database? Is it even possible to PHP to retrieve data from Firebase?
Yes, there is now a PHP client library.
use Google\Cloud\Firestore\FirestoreClient;
$db = new FirestoreClient();
$citiesRef = $db->collection('cities');
$query = $citiesRef->where('state', '=', 'CA');
$snapshot = $query->documents();
foreach ($snapshot as $document) {
printf('Document %s returned by query state=CA' . PHP_EOL, $document->id());
}
You'll find more examples in our documentation now, just select the PHP tab on the snippets.