How to catch database errors in PHP?

Question

PostgreSQL

I use: PHP/CodeIgniter, PostgreSQL.
An error occurs in one of the INSERT queries:

A PHP Error was encountered
Severity: Warning
Message: pg_query(): Query failed: ERROR: Duplicate key value violates unique constraint "users_uk"
DETAIL: Key "(login)=(tester)" already exists.
Filename: postgre/postgre_driver.php
Line Number: 242

How is it cultural to intercept? And, if possible, report that a record with such a key already exists.

Answer 1

https://stackoverflow.com/questions/7843406/codeig...

Answer 2

It's all about the ENVIRONMENT constant in the index.php file .
In the development mode, absolutely all PHP errors are displayed.
Replace with
error_reporting(E_ALL & ~E_WARNING);