How to display PHP errors in code output?

ini_set('display_errors', 1);
error_reporting(E_ALL ^ E_NOTICE);

Inside your php.ini, set the display_errors to On:

display_errors = On

Then restart your web server.

Try -1. From the documentation, "Passing in the value -1 will show every possible error, even when new levels and constants are added in future PHP versions."

// Report all PHP errors
error_reporting(-1);

If that doesn't work, try to do an ini_set:

// Same as error_reporting(E_ALL);
ini_set('error_reporting', E_ALL);