The quoteInto method is a feature provided by the Zend_Db library in PHP for creating SQL query parameters safely by automatically quoting and escaping values. If you’re not using Zend_Db or prefer an alternative method for parameterizing queries with PDO (PHP Data Objects), you can achieve the same result by using prepared statements directly.

Here’s how you can use prepared statements with PDO:

1. Prepare the SQL Statement: Create a prepared statement by using the prepare method of the PDO connection object. In the SQL query, use placeholders (? or :name) for the values you want to parameterize.
2. Bind Values: Bind values to the placeholders in the prepared statement using the bindValue or bindParam methods. This ensures that the values are safely passed to the database without the risk of SQL injection.
3. Execute the Statement: Execute the prepared statement with the execute method. The bound values will be substituted into the SQL query at runtime.

Here’s an example:

// Connect to the database using PDO
$dsn = 'mysql:host=localhost;dbname=mydatabase';
$username = 'username';
$password = 'password';

try {
    $pdo = new PDO($dsn, $username, $password);
} catch (PDOException $e) {
    die('Connection failed: ' . $e->getMessage());
}

// Prepare the SQL statement with placeholders
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");

// Bind values to the placeholders
$username = 'john_doe';
$stmt->bindParam(':username', $username, PDO::PARAM_STR);

// Execute the statement
$stmt->execute();

// Fetch results
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);

// Do something with the results
foreach ($results as $row) {
    echo $row['username'] . "\n";
}

In this example, :username is a placeholder for the value we want to parameterize. We bind the value 'john_doe' to the placeholder using the bindParam method. The PDO::PARAM_STR parameter specifies that the bound value is a string. Finally, we execute the prepared statement and fetch the results.

Using prepared statements with PDO provides a secure and efficient way to parameterize SQL queries without relying on quoteInto or manual quoting and escaping of values.