Prepared PHP PDO Statements

<?php
  $host = 'host';
  $user = 'user';
  $pass = 'pass';
  $db =  'db';
  // Create connection
  $conn = new mysqli($host, $user, $pass, $db);
  // Check connection
  if ($conn->connect_error) {
    die("Failed to connect: " . $conn->connect_error); 
  }
  // bind and prepare
  $stmt = $conn->prepare("INSERT INTO users (name, surname, email) VALUES (?, ?, ?)");
  $stmt->bind_param("sss", $name, $surname, $email);
  // set parameters and execute
  $name = "John";
  $surname = "Doe";
  $email = "[email protected]";
  $stmt->execute();

  $name = "Mary";
  $surname = "Moe";
  $email = "[email protected]";
  $stmt->execute();

  $name = "Julie";
  $surname = "Dooley";
  $email = "[email protected]";
  $stmt->execute();
  
  echo "Uploaded.";
  $stmt->close();  
  $conn->close();
?>