phpmailer_setup.php

<?php
if (file_exists(__DIR__ . '/vendor/autoload.php')) {
    require_once __DIR__ . '/vendor/autoload.php';
} else {
    // Fallback: PHPMailer not installed, define a dummy sendEmail function
    if (!function_exists('sendEmail')) {
        function sendEmail($to, $subject, $body, $replyTo = null) {
            error_log("PHPMailer not installed. Email to $to not sent.");
            return false;
        }
    }
}

if (!class_exists('PHPMailer\PHPMailer\PHPMailer')) {
    // PHPMailer classes not loaded, define dummy sendEmail function
    if (!function_exists('sendEmail')) {
        function sendEmail($to, $subject, $body, $replyTo = null) {
            error_log("PHPMailer classes not loaded. Email to $to not sent.");
            return false;
        }
    }
} else {
    // Import classes inside function to avoid syntax error
    if (!function_exists('sendEmail')) {
        function sendEmail($to, $subject, $body, $replyTo = null) {
            $mail = new \PHPMailer\PHPMailer\PHPMailer(true);
            try {
                //Server settings
                $mail->isSMTP();
                $mail->Host       = 'smtp.gmail.com'; // Gmail SMTP server
                $mail->SMTPAuth   = true;
                $mail->Username   = 'booker.library.staff@gmail.com'; // Your Gmail address
                $mail->Password   = 'jbai gevm jtgl ucvx'; // Your Gmail app password
                $mail->SMTPSecure = \PHPMailer\PHPMailer\PHPMailer::ENCRYPTION_STARTTLS;
                $mail->Port       = 587;

                // Disable SSL certificate verification (for local development)
                $mail->SMTPOptions = array(
                    'ssl' => array(
                        'verify_peer' => false,
                        'verify_peer_name' => false,
                        'allow_self_signed' => true
                    )
                );

                //Recipients
                $mail->setFrom('your-email@gmail.com', 'Booker Library'); // Use your Gmail address
                $mail->addAddress($to);
                if ($replyTo) {
                    $mail->addReplyTo($replyTo);
                }

                // Content
                $mail->isHTML(false);
                $mail->Subject = $subject;
                $mail->Body    = $body;

                $mail->send();
                return true;
            } catch (\PHPMailer\PHPMailer\Exception $e) {
                error_log("Message could not be sent. Mailer Error: {$mail->ErrorInfo}");
                return $mail->ErrorInfo;
            }
        }
    }
}
?>