insert multiple rows into database via form

<form action="insert.php" method="post">
  <input type="text" name="names[]" placeholder="Name">
  <input type="text" name="ages[]" placeholder="Age">
  <input type="text" name="emails[]" placeholder="Email">
  <input type="text" name="names[]" placeholder="Name">
  <input type="text" name="ages[]" placeholder="Age">
  <input type="text" name="emails[]" placeholder="Email">
  <input type="submit" value="Insert">
</form>
PHP code (insert.php):

<?php

// Get the form data
$names = $_POST['names'];
$ages = $_POST['ages'];
$emails = $_POST['emails'];

// Create a PDO object to connect to the database
$db = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

// Prepare the SQL statement for insertion
$sql = "INSERT INTO mytable (name, age, email) VALUES (:name, :age, :email)";

// Prepare the PDO statement for execution
$stmt = $db->prepare($sql);

// Loop through each set of form data and execute the prepared statement
for ($i = 0; $i < count($names); $i++) {
  $name = $names[$i];
  $age = $ages[$i];
  $email = $emails[$i];
  $stmt->bindParam(':name', $name);
  $stmt->bindParam(':age', $age);
  $stmt->bindParam(':email', $email);
  $stmt->execute();
}

// Close the database connection
$db = null;

// Redirect to a confirmation page
header('Location: confirmation.php');
exit();
?>