Audit logs
Audit logs summarize the history of changes made within your Cloudflare account. Audit logs include account level actions like login, as well as zone configuration changes.
Cloudflare API docsGet
Gets a list of audit logs for an account. Can be filtered by who made the change, on which zone, and the timeframe of the change.
php
$response = $client->accounts()->auditLogs()->list('ACCOUNT_ID');