XenForo Enable Debug Mode for Specific IP Addresses

Debug mode gives more access to error messages, debugging/performance information, and development tools. It should not be run on a production forum as it may degrade performance or even open up security issues. However, you can limit it so that debug mode only runs for a few specific users (usually those who are charged with maintaining your forum/server).

Substitute 127.0.0.1 with the desired IP addresses that you wish to enable debug mode for.

/library/config.php

PHP:

<?php

$config['db']['host'] = 'hostname';
$config['db']['port'] = '3306';
$config['db']['username'] = 'username';
$config['db']['password'] = 'password';
$config['db']['dbname'] = 'database';

// Enable debug mode for these IP addresses
$allowedIPs = array(
    '127.0.0.1', // First allowed IP address
    '127.0.0.1', // Second allowed IP address
);

if (in_array($_SERVER['REMOTE_ADDR'], $allowedIPs)) {
    $config['debug'] = true;
}

Now you can safely leave debug mode enabled, as only the allowed users will be able to access it.