If you need to send a Firebase notification using PHP, then simply use these tutorials, which can help you send the notification to Android and iPhone devices. Basically there is a GCM (Google Cloud Messaging), which is sending the notification, but now Google has launched Firebase Cloud Messaging (FCM).
This tutorial is for implementing the PHP mailer with SMTP authentication. You can set SMTP authentication mail to your website using this. So simply follow the setup, and you can get working SMTP authentication mail.
You have an Excel file, and if you want to import that Excel file to your database, then fetch the cell value using these tutorials. You can directly import to your MySQL, MS SQL, and various databases using this library and tutorials. Just download the library and integrate the below code there.
Here we will explain to you how to create a custom post type with a category and extra fields in WordPress. This tutorial will help for making the custom post type so you can generate your posts with categories and show them on the front page.
