PHP - Interbase - 调用未定义的函数ibase_connect（）

I'm trying to connect to a Firebase Database server but I'm getting:

PHP Fatal error:  Uncaught Error: Call to undefined function ibase_connect()

It was working good, but today it started to throw that error. I've been for the last hours searching on the internet in every page, even in Portuguese, but nothing helps.

Almost in every post they are dealing with W/L/XAMPP, but that doesn't help.

I'm trying this on a valueserver shared host (I don't even know which company is that). PHP Version: 7.2.1

The file is running via cron job.

This is what I'd tried:

1. Verify in php.ini that interbase is uncommented.
2. Look for server errors (none).

Please I don't know what to do.