Enable all errors. Convert Errors to Exceptions

debug_mode.php

<?php

const DEBUG = true;

error_reporting(DEBUG ? E_ALL : 0);
ini_set('display_errors', DEBUG ? 'on' : 'off');

set_error_handler(function($err_no, $err_str, $err_file, $err_line ) {
	if (!(error_reporting() & $err_no)) {
		return;
	}
	throw new ErrorException($err_str, 0, $err_no, $err_file, $err_line);
});