php 7 + mssql + iis 7.5 can't connect

Good afternoon, I have already googled the entire innet, nothing helps, all hope remains for you:

PHP 7, IIS 7.5 Windows Server 2008r2 error occurs when trying to connect to MSSQL:

PHP Fatal error:  Uncaught Error: Call to undefined function sqlsrv_connect() in C:\inetpub\путь\connect.php:4
Stack trace:
#0 {main}
  thrown in C:\путь\connect.php on line 4

In php.ini, the extension=php_mssql.dll directive is missing, php.ini itself is not in this release, it was replaced with php.ini-development and php.ini-production

The script itself:

$serverName = "mssql02\";
$connectionInfo = array( "Database"=>"", "UID"=>"", "PWD"=>"");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn ) {      
     echo "Соединение удалось.<br />";
}else{
     echo "Соединение не удалось, ошибка:";
     die( print_r( sqlsrv_errors(), true));
}

The fact that there is no server name, user, password, etc. this is not an error, just removed specifically

PDO uploaded, uploaded to ext folder: in the php config, I added the line:

But it won't work

There are no PDO drivers at all in the phpinfo output

ODBC driver installed, this one https://www.microsoft.com/ru-ru/download/details.aspx?id=36434