Can you do a zero downtime Laravel migration?

Yes, with the strangler fig pattern. The new Laravel application runs alongside the legacy system on a separate domain or subdomain. Specific bounded contexts (a checkout, a dashboard, a customer area) cut over from old to new in stages while the rest of the legacy system keeps serving traffic. Data sync runs through change data capture or scheduled jobs during the transition. Final DNS switch happens during a low traffic window with TTL set to five minutes, so rollback takes minutes if anything looks off. We have run this pattern on production migrations with zero unplanned downtime.