Push Notifications for Laravel and Expo

NotificationHandler.php

<?php

namespace App\Services;

/**
 * Model that holds the Expo Push Tokens
 *
 * Related to App\User
 */
use App\PushToken;

class NotificationHandler
{
    /**
     * Send Notifications
     *
     * @param String $title
     * @param String $body
     * @param Array  $users
     */
    public function send($title, $body, $users = [])
    {
        $query = count($users) > 0
            ? PushToken::whereIn('user_id', collect($users)->pluck('id')->toArray())
            : PushToken::query();

        $query->chunk(100, function ($tokens) use ($title, $body) {
            $data = [];
            foreach ($tokens as $token) {
                $data[] = [
                    'to' => $token->token,
                    'title' => $title,
                    'body' => $body
                ];
            }

            $request = curl_init();

            curl_setopt_array($request, [
                CURLOPT_URL => 'https://exp.host/--/api/v2/push/send',
                CURLOPT_HTTPHEADER => [
                    'Content-Type: application/json'
                ],
                CURLOPT_POST => 1,
                CURLOPT_POSTFIELDS => json_encode($data)
            ]);

            curl_exec($request);
        });
    }
}