The new PECL package sqlsrv-5.7.1preview (devel) has been released at 
https://pecl.php.net/.

Release notes
-------------
[Added]
- Support for PHP 7.4
- Support for Red Hat 8 and macOS Catalina (10.15)
- Feature Request [#1018](https://github.com/microsoft/msphpsql/issues/1018) - 
support for [PHP extended string 
types](https://github.com/microsoft/msphpsql/wiki/Features#natlTypes) - Pull 
Request [#1043](https://github.com/microsoft/msphpsql/pull/1043)
- [Always Encrypted with secure 
enclaves](https://github.com/microsoft/msphpsql/wiki/Features#alwaysencryptedV2),
 which requires [MS ODBC Driver 
17.4+](https://docs.microsoft.com/sql/connect/odbc/download-odbc-driver-for-sql-server?view=sql-server-ver15)
 and [SQL Server 2019](https://www.microsoft.com/sql-server/sql-server-2019)
[Removed]
- Dropped support for [PHP 7.1](https://www.php.net/supported-versions.php)
[Fixed]
- Issue [#1027](https://github.com/microsoft/msphpsql/issues/1027) - Fixed how 
drivers handle query timeout settings
- Pull Request [#1049](https://github.com/microsoft/msphpsql/pull/1049) - 
performance improvement for fetching from tables with many columns - cached the 
derived php types with column metadata to streamline data retrieval
[Limitations]
- No support for inout / output params when using sql_variant type
- No support for inout / output params when formatting decimal values
- 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/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server)
  - 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
  - Issue [#1050](https://github.com/microsoft/msphpsql/issues/1050) - With 
Always Encrypted enabled, insertion requires the column list for any tables 
with identity columns
  - [Always Encrypted 
limitations](https://docs.microsoft.com/sql/connect/php/using-always-encrypted-php-drivers#limitations-of-the-php-drivers-when-using-always-encrypted)
[Known Issues]
- Data Classification metadata retrieval requires ODBC Driver 17.4.2.1+ and 
[SQL Server 2019](https://www.microsoft.com/sql-server/sql-server-2019)
- Connection pooling on Linux or macOS is not recommended with 
[unixODBC](http://www.unixodbc.org/) < 2.3.7
- 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)

Package Info
-------------
The Microsoft Drivers for PHP for SQL Server are PHP extensions that allow for 
the reading and writing of SQL Server data from within PHP scripts. The SQLSRV 
extension provides a procedural interface while the PDO_SQLSRV extension 
implements PDO for accessing data in all editions of SQL Server 2008 R2 and 
later (including Azure SQL DB). These drivers rely on the Microsoft ODBC Driver 
for SQL Server to handle the low-level communication with SQL Server.
*This package contains only the SQLSRV driver.*

Related Links
-------------
Package home: https://pecl.php.net/package/sqlsrv
   Changelog: https://pecl.php.net/package-changelog.php?package=sqlsrv
    Download: https://pecl.php.net/get/sqlsrv-5.7.1preview.tgz

Authors
-------------
Meet Bhagdev <me...@microsoft.com> (lead)
Jay Kint <jayk...@microsoft.com> (lead)
Marie Barwin (lead)
Jenny Tam (lead)
David Puglielli (lead)

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