v1.1.0

• Add synchronous methods trackSync(), identifySync(), and groupSync() that return BatchResponse or throw SendException

• Add getQueueSize() method to check pending events in queue

• Add logger callback option for custom logging integration

• Add onError callback option for error handling (receives exception and failed events)

• Add onSuccess callback option (receives BatchResponse)

• Support group-only events by passing groupId without userId for organization-level tracking (webhooks, cron jobs, system events)

• BREAKING: Minimum PHP version increased from 8.1 to 8.2

• BREAKING: Remove IP tracking - the ip option is no longer supported in track(), identify(), or group() methods

v1.0.1

• Implement PHP SDK with core functionality for Klime API integration