Browser and CLI have Different php_pdo_pgsql Extension Versions

I seem to have a very weird issue where the version of my php_pdo_pgsql extension when used through CLI is different to the version used in the browser.

Why is an intarray operator not available when the query is called using PDO?

PostgreSQL version 14

Why is an intarray operator not available when the query is called using PDO?

PostgreSQL version 14

trouble enabling pdo for postgresql

I have a web application that runs on php and that connects to a postgreql database running on a remote Ubuntu server.