What potential issue is the user facing with connecting to the SQL Server in their PHP code?

The potential issue the user is facing with connecting to the SQL Server in their PHP code could be related to incorrect credentials, server configuration, or missing SQL Server drivers. To solve this issue, the user should ensure that the server credentials are correct, the SQL Server is properly configured to allow remote connections, and the necessary SQL Server drivers are installed on the server.

<?php
$serverName = "your_server_name";
$connectionOptions = array(
    "Database" => "your_database_name",
    "Uid" => "your_username",
    "PWD" => "your_password"
);

// Establishes the connection
$conn = sqlsrv_connect($serverName, $connectionOptions);

if ($conn) {
    echo "Connection established successfully.";
} else {
    echo "Connection could not be established.";
    die(print_r(sqlsrv_errors(), true));
}
?>