Found the fix…
I ran yum swap php72w-mysql php72w-mysqlnd and it resolved the error in shell.
Here’s the output of my ./validate.php
[root@SL-LibreNMS librenms]# ./validate.php
| Component | Version |
|---|---|
| LibreNMS | 1.42.01-69-gd46f300 |
| DB Schema | 260 |
| PHP | 7.2.8 |
| MySQL | 5.5.60-MariaDB |
| RRDTool | 1.4.8 |
| SNMP | NET-SNMP 5.7.2 |
====================================
[OK] Composer Version: 1.7.2
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct