function sql($query) {

    // SQL Connection details
    include "sql.php";

    // Initialize PDO connection
    $pdo = new PDO($sqldsn, $sqluser, $sqlpass, $sqlopt);

    // Prepare and execute statement
    $stm = $pdo->prepare("$query");
    $stm->execute();

    // Fetch results into array
    $result = $stm->fetchAll(PDO::FETCH_GROUP|PDO::FETCH_UNIQUE);
    return $result;

}

// Main
$sqlhost = 'localhost';
$sqldb   = 'MyDB';
$sqluser = 'mysqluser';
$sqlpass = 'mypassword';
$sqlport = "";


// PDO Options
$sqlchar = 'utf8';
$sqldsn = "mysql:host=$sqlhost;dbname=$sqldb;charset=$sqlchar";
$sqlopt = [
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    PDO::ATTR_EMULATE_PREPARES   => false,
];

// Statement
$sql = "INSERT INTO `MyTable` (`UserName`, `Email`, `ExpiryDate`, `Notes`) VALUES ('$username', '$email', '$expirydate', '$notes');";

// Run query
sql($sql);

$notes = addslashes($notes);