Prepared Statements With PHP PDO

<?php
  $host = 'host';
  $user = 'user';
  $pass = 'pass';
  $db = 'db';
  try {
    $conn = new PDO("mysql:host=$host;dbname=$db", $user, $pass);
    // set error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    //bind parameters and prepare sql
    $stmt = $conn->prepare("INSERT INTO users (name, surname, email) VALUES (:name, :surname, :email)");
    $stmt->bindParam(':name', $name);
    $stmt->bindParam(':surname', $surname);
    $stmt->bindParam(':email', $email); 
    // insert a row
    $name = "John";
    $surname = "Doe";
    $email = "[email protected]";
    $stmt->execute();
    // insert another row
    $name = "Mary";
    $surname = "Moe";
    $email = "[email protected]";
    $stmt->execute();
    // insert another row
    $name = "Julie";
    $surname = "Dooley"; 	
    $email = "[email protected]";
    $stmt->execute();
    echo "New records created successfully";
  } catch(PDOException $e) {
    echo "Error: " . $e->getMessage();
  }
  $conn = null;  
?>