Changes
[Added]
- Added support for PHP 7.3.0 RC 1
- Added support for Azure AD Access Token (in Linux / macOS this requires [MS ODBC Driver 17+](https://docs.microsoft.com/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server) and [unixODBC](http://www.unixodbc.org/) 2.3.6+)
- Feature Request [#844](https://github.com/Microsoft/msphpsql/pull/844) - add ReturnDatesAsStrings option to statement level for sqlsrv
- Compatible with [ODBC Driver 17.3 CTP](https://blogs.msdn.microsoft.com/sqlnativeclient/2018/09/24/odbc-driver-17-3-preview-for-sql-server-released/)
[Removed]
- Dropped support for Ubuntu 17.10
- Dropped support for PHP 7.0 - [Version 5.3](https://docs.microsoft.com/sql/connect/php/system-requirements-for-the-php-sql-driver?view=sql-server-2017) is the last to support PHP 7.0.
[Fixed]
- Pull Request [#836](https://github.com/Microsoft/msphpsql/pull/836) - Modified the config files to enable Spectre Mitigations (use /Qspectre switch) for PHP 7.2
- Pull Request [#833](https://github.com/Microsoft/msphpsql/pull/833) - Streamlined the error handling to remove a potential cause of crash
[Limitations]
- No support for inout / output params when using sql_variant type
- In Linux and macOS, setlocale() only takes effect if it is invoked before the first connection. Attempting to set the locale after connecting will not work
- Always Encrypted requires [MS ODBC Driver 17+](https://docs.microsoft.com/en-us/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server?view=sql-server-2017)
- Only Windows Certificate Store and Azure Key Vault are supported. Custom Keystores are not yet supported
- Issue [#716](https://github.com/Microsoft/msphpsql/issues/716) - With Always Encrypted enabled, named parameters in subqueries are not supported
- [Always Encrypted limitations](https://docs.microsoft.com/en-us/sql/connect/php/using-always-encrypted-php-drivers?view=sql-server-2017#limitations-of-the-php-drivers-when-using-always-encrypted)
[Known Issues]
- Connection pooling on Linux or macOS is not recommended with [unixODBC](http://www.unixodbc.org/) < 2.3.6
- When pooling is enabled in Linux or macOS
- unixODBC <= 2.3.4 (Linux and macOS) might not return proper diagnostic information, such as error messages, warnings and informative messages
- due to this unixODBC bug, fetch large data (such as xml, binary) as streams as a workaround. See the examples [here](https://github.com/Microsoft/msphpsql/wiki/Features#pooling)
- With ColumnEncryption enabled, calling stored procedure with XML parameter does not work (Issue [#674](https://github.com/Microsoft/msphpsql/issues/674))
- With ColumnEncryption enabled, fetching varbinary(max), varchar(max) or nvarchar(max) may fail with ODBC Driver 17.3 CTP