Installation
The SQLSRV extension is enabled by adding appropriate DLL file to your PHP
extension directory and the corresponding entry to the php.ini file. The SQLSRV
download comes with 8 driver files, four of which are for PDO support.
The most recent version of the driver is available for download here:
» SQLSRV download.
For more information about SQLSRV requirements, see
» SQLSRV System Requirements.
Since version 4.0 the SQLSRV extension is compatible only with PHP 7.0 running on Linux or Windows.