What are the best practices for deleting old files and databases before reinstalling a PHP forum like phpBB2?

When reinstalling a PHP forum like phpBB2, it is important to delete old files and databases to ensure a clean installation and prevent any conflicts or errors. To do this, you can manually delete the old files and drop the existing database tables before proceeding with the reinstall.

// Delete old files
$old_files = glob('/path/to/phpBB2/*');
foreach($old_files as $file){
    if(is_file($file)){
        unlink($file);
    }
}

// Drop existing database tables
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "DROP DATABASE IF EXISTS $dbname";
if ($conn->query($sql) === TRUE) {
    echo "Database dropped successfully";
} else {
    echo "Error dropping database: " . $conn->error;
}

$conn->close();