What potential pitfalls should be considered when using PHP with the latest Service Pack of MS SQL Server?

When using PHP with the latest Service Pack of MS SQL Server, potential pitfalls to consider include compatibility issues between PHP and the SQL Server version, security vulnerabilities, and performance issues. To address these concerns, ensure that PHP is configured to work with the specific version of SQL Server, implement secure coding practices to prevent SQL injection attacks, and optimize queries for better performance.

<?php
$serverName = "localhost";
$connectionOptions = array(
    "Database" => "dbName",
    "Uid" => "username",
    "PWD" => "password"
);
// Establishes the connection
$conn = sqlsrv_connect($serverName, $connectionOptions);
if ($conn === false) {
    die(print_r(sqlsrv_errors(), true));
}
?>