I have installed php-json and if I check /home/account/public_html and run php -m, I can see json is showing.

However, if I go to /home/account/lib or /home/account/lib/public and run php -m, json is not showing.

The extension is installed generally, how can I rectify this?
I suppose the general question is why is it showing in public_html and nowhere else?

Thanks.