wp-debug.php

define('WP_DEBUG', true); 

if (WP_DEBUG) {
    
    /**
     * Log errors to wp-content/debug.log
     * Don't forget to delete this when you're finished,
     * as it may be publicly accessible.
     */
    define('WP_DEBUG_LOG', true);
    
    //Use dev libraries instead of minified versions.
    define('SCRIPT_DEBUG', true);
    
    // Log queries so they can be viewed after request. (https://wordpress.org/plugins/debug-bar/)
    define('SAVEQUERIES', true);

    /**
     * Only display errors to users 
     * Prevents users from being distrubed by errors while you're debugging
     * Replace 127.0.0.1 with your IP address, and add as many as you like
     */
    if ( in_array( $_SERVER['REMOTE_ADDR'], array( '127.0.0.1', 'more...ips...' ) ) ) {
        define('WP_DEBUG_DISPLAY', true);
    } else {
        define('WP_DEBUG_DISPLAY', false);  
    }
}