Best way to expose failing processes in php & mysql?

I’m in the Mac Intel Catalina Osx environment.

What is the tool developers here are using to expose the errors with a php page failing to execute a query to a local database?

The debug setting does not work for this.

And the Chrome Developers Tools is not not showing what I need to see even in Network & Event Log settings.

I only see the persistent TimeStamp error but that is not required to save a record in my table.

Apache & mysql server logs not helpful.