How to execute SQL statements after PHP connection to SQL serve

<?php
Header ("Content-type:text/html;charset=utf-8");
//
$conInfo =array (' Database ' = ' dbname ', ' UID ' = ' user ', ' PWD ' = ' password ');

$conn =sqlsrv_connect (' servername/ip ', $conInfo);

$sql = "SELECT * from Product where productno=10001";

$params = Array ();

$options = Array ("scrollable" = Sqlsrv_cursor_keyset);

$stmt = sqlsrv_query ($conn, $sql, $params, $options);

$row _count = sqlsrv_num_rows ($stmt);

/* Determine if the connection is successful or not: */

if (! $conn) echo "faild! connection error, user name password is not correct";
else echo "ok! can be connected";

Determine the number of rows in the query result
if ($row _count = = = False)
echo "Error in Retrieveing row count.";
Else
echo $row _count;

?>

How to execute SQL statements after PHP connection to SQL serve