Explain advanced multi-tenant SaaS architecture in PHP applications.

Multi-tenant SaaS architectures isolate customer workloads securely while maximizing infrastructure efficiency and scalability.

Multi-tenancy allows multiple customers (tenants) to share infrastructure while maintaining logical isolation.

Core architectural goals:

Tenant isolation models:

All tenants share tables. Tenant IDs separate data.

Pros:

Cons:

Each tenant receives isolated schemas.

Strong isolation.

Highest isolation. Often enterprise tier.…