## 4.0.16 - 2026-06-13
* ### Fixed
* **`CreateBatchOrderResponse::$batchId`** now deserializes correctly. The `createBatchOrder` endpoint returns the batch id as `batch_id` (snake_case), but the SDK looked for `batchId`, leaving it unset and throwing `Cannot assign null to property ...::$batchId of type float`. The wire mapping is corrected to `batch_id` and the property is now nullable (`?float`). The `$response->batchId` accessor is unchanged.

This is a backward-compatible patch release. No breaking changes.

## 4.0.15 - 2026-06-13
* ### Fixed
* **`GetCampaignStats`** count fields are now nullable (`?int`): `clickers`, `complaints`, `delivered`, `hardBounces`, `sent`, `softBounces`, `trackableViews`, `uniqueClicks`, `uniqueViews`, `unsubscriptions`, `viewed`. This model is reused for `statsByDomain` entries on `getEmailCampaign(s)`, where per-domain rows are sparse and the API returns `null`/absent for some counts. The previous non-nullable `int` typing caused a `TypeError` during deserialization of `statsByDomain` while `globalStats` succeeded. ([#138](https://github.com/getbrevo/brevo-php/issues/138))

This is a backward-compatible patch release. No breaking changes.

## 4.0.14 - 2026-06-12
* ### Fixed
* **`GetTransacBlockedContactsResponseContactsItem::$senderEmail`** is now nullable (`?string`). The API returns `null` for some blocked/unsubscribed contacts, which previously caused a `TypeError`. ([#137](https://github.com/getbrevo/brevo-php/issues/137))
* **`campaignId`** is now nullable (`?int`) on `GetContactInfoResponseStatisticsUnsubscriptionsUserUnsubscriptionItem` and `GetContactStatsResponseUnsubscriptionsUserUnsubscriptionItem`. Form-based (non-campaign) unsubscriptions return `null`, which previously caused a `TypeError`. ([#136](https://github.com/getbrevo/brevo-php/issues/136))
* **Guzzle timeout support** now works: the PSR-18 client detection used `class_exists('GuzzleHttp\ClientInterface')`, which never matches an interface. Changed to `interface_exists(...)`, so the `timeout` option is honored with a Guzzle client instead of emitting a warning. ([#133](https://github.com/getbrevo/brevo-php/issues/133))

This is a backward-compatible patch release. No breaking changes.

## 4.2.0 - 2026-03-24
* ### Changed
* **API methods** now return `null` instead of throwing `BrevoException` when the server responds with empty content for successful requests, providing more graceful error handling across all clients.

## 4.1.0 - 2026-03-24
* ### Added
* **BrevoException** now provides more descriptive error messages when API calls succeed but return empty response bodies, replacing generic JsonException errors and improving debugging experience.

## 4.0.12 - 2026-03-12
* fix: improve JSON serialization and test configuration
* Fix boolean type handling in JSON serialization and deserialization by adding explicit checks for bool values, since PHP's gettype() returns "boolean" instead of "bool". Also improve property default value detection using hasDefaultValue() check to avoid potential warnings. Update test configuration to support external WireMock orchestration via WIREMOCK_URL environment variable.
* Key changes:
* Add special case handling for bool types in JsonSerializer and JsonDeserializer
* Use hasDefaultValue() check before calling getDefaultValue() in JsonSerializableType
* Make test suite configurable with WIREMOCK_URL environment variable
* Support dynamic port discovery for WireMock container in bootstrap
* 🌿 Generated with Fern

## 4.0.11 - 2026-03-12
* SDK regeneration
* Unable to analyze changes with AI, incrementing PATCH version.

## 4.0.6 - 2026-02-24
* chore: update Fern CLI version to 3.85.3
* Update the Fern CLI version from 3.82.0 to 3.85.3 to incorporate latest tooling improvements and bug fixes.
* Key changes:
* Update cliVersion in .fern/metadata.json from 3.82.0 to 3.85.3
* Maintain existing generator configuration settings
* 🌿 Generated with Fern

## 4.0.2 - 2026-02-23
* chore: downgrade Fern CLI version and update wiremock test data
* Update Fern CLI from version 3.82.0 to 3.76.0 and simplify wiremock test data by removing nested records structure from association objects.
* Key changes:
* Downgrade Fern CLI version from 3.82.0 to 3.76.0 in metadata.json
* Simplify association object structure in wiremock mappings
* Remove nested "records" array from garage association test data
* 🌿 Generated with Fern