What are the recommended PHP libraries for sending emails in the background?

Sending emails in the background is a common practice to improve the performance of web applications by offloading the email sending process to a separate task. This can be achieved by using PHP libraries like Swift Mailer, PHPMailer, or Symfony Mailer, which provide functionality to send emails asynchronously using queues or background processes. 

// Using Swift Mailer library to send emails in the background
require_once 'vendor/autoload.php';

$transport = new Swift_SmtpTransport('smtp.example.com', 25);
$mailer = new Swift_Mailer($transport);

$message = (new Swift_Message('Wonderful Subject'))
    ->setFrom(['john.doe@example.com' => 'John Doe'])
    ->setTo(['receiver@example.com' => 'Receiver Name'])
    ->setBody('Here is the message body');

// Send the message asynchronously
$failedRecipients = [];
$numSent = $mailer->send($message, $failedRecipients);

if ($numSent) {
    echo 'Email sent successfully!';
} else {
    echo 'Failed to send email to: ' . implode(', ', $failedRecipients);
}

Keywords

PHP libraries sending emails background recommended

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