What tools or technologies would you use to implement a simple application with basic functionality?

For a simple application with basic functionality in PHP, the following tools can be used:

• PHP as the server-side language.
• MySQL or SQLite for data storage.
• Apache or Nginx as the web server.
• A framework, such as Laravel or Symfony, to speed up development and organize code.
• For simplicity, you can also do without a framework, using plain PHP with database connection via PDO.

Example of a simple PHP script that outputs data from the database:

<?php
$pdo = new PDO('mysql:host=localhost;dbname=testdb', 'user', 'pass');
$stmt = $pdo->query('SELECT * FROM users');
while ($row = $stmt->fetch()) {
    echo $row['name'] . "<br>";
}
?>

This set allows you to quickly create and launch a basic web application.