Single use plugin and filter showing how to change WP Debugging default constants.

change-wp-debugging-defaults.php

<?php
/**
 * Plugin Name:          Change WP Debugging Defaults
 * Plugin URI:           https://gist.github.com/afragen/5c79984f154911be171c80468f676572
 * Description:          Single use plugin and filter showing how to change WP Debugging default constants.
 * Version:              0.1
 * Author:               Andy Fragen
 * License:              MIT
 * Requires at least:    5.2
 * Requires PHP:         7.1
 * Gist Plugin URI:      https://gist.github.com/afragen/5c79984f154911be171c80468f676572
 */
 
 add_filter(
	'wp_debugging_add_constants',
	function ( $added_constants ) {
		$my_constants = [
			'WP_DEBUG_DISPLAY' => [ 'value' => 'false' ],
			'SCRIPT_DEBUG' => [ 'value' => 'false'],
		];

		return array_merge( $added_constants, $my_constants );
	},
	10,
	1
);