What are the potential pitfalls of using the mssql_ or PDO functions with MSSQL in PHP?

Potential pitfalls of using the mssql_ or PDO functions with MSSQL in PHP include deprecated functions, lack of support for newer MSSQL versions, and potential security vulnerabilities. To solve these issues, it is recommended to use the SQLSRV extension provided by Microsoft, which is actively maintained and supports the latest features of MSSQL.

// Using SQLSRV extension to connect to MSSQL database
$serverName = "localhost";
$connectionOptions = array(
    "Database" => "dbName",
    "Uid" => "username",
    "PWD" => "password"
);
$conn = sqlsrv_connect($serverName, $connectionOptions);

if ($conn) {
    echo "Connected to MSSQL database successfully";
} else {
    echo "Connection could not be established";
}