How to activate Perfmatters using PHP constant in wp-config.php

You can activate your license key for Perfmatters using PHP code in wp-config.php.

Configuring your license key

You can use the PERFMATTERS_LICENSE_KEY constant to define the Perfmatters license key by adding the following to your wp-config.php file. (**** is your license key)

define('PERFMATTERS_LICENSE_KEY', '****');

This will typically go beneath the WP_DEBUG constant.

The license will then be activated the next time WordPress admin is accessed. Multisite setups are also supported.

If the key is removed from wp-config.php, the license will automatically be deactivated.