config.php.example

<?php
// Example config.php
/* Database credentials. Assuming you are running MySQL
server with default setting (user 'root' with no password) */
define('DB_SERVER', 'hostname');
define('DB_USERNAME', 'username');
define('DB_PASSWORD', 'password');
define('DB_NAME', 'dbname');

define('MAIL_SERVER', 'mail.example.com');
define('MAIL_PORT', 587);
define('MAIL_USER', 'user');
define('MAIL_PASSWORD', 'password');
define('MAIL_DOMAIN', 'example.com');
 
/* Attempt to connect to MySQL database */
$link = mysqli_connect(DB_SERVER, DB_USERNAME, DB_PASSWORD, DB_NAME);
 
// Check connection
if($link === false){
    die("ERROR: Could not connect. " . mysqli_connect_error());
}

require("/usr/share/php/libphp-phpmailer/autoload.php");
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;

$mailer = null;

function new_mail() {
    global $mailer;
    $mailer = new PHPMailer();
    $mailer->isSMTP();
    $mailer->Host = MAIL_SERVER;
    $mailer->Port = MAIL_PORT;
    $mailer->SMTPAuth = true;
    $mailer->Username = MAIL_USER;
    $mailer->Password = MAIL_PASSWORD;
    $mailer->isHTML(false);
}

new_mail();

?>