Sending Email in PHP: PHPMailer, mail() and Alternatives |…

Sending Email in PHP: From the Built-in mail() to Powerful Libraries

Sending emails is one of the key functions of any web application: user registration, password recovery, notifications, newsletters. In PHP, there are several approaches: from the simplest built-in mail() function to specialized libraries such as PHPMailer and SwiftMailer. In this article, we will thoroughly examine each method, show code examples, and provide recommendations for choosing.

1. The Built-in mail() Function

The mail() function is the simplest way to send an email. It uses the mail server configured in the PHP settings (sendmail_path or SMTP). However, its capabilities are limited, and it does not support modern requirements: HTML formatting, attachments, SMTP authentication.

Basic Example

<?php$to = 'user@example.com';$subject = 'Email Subject';$message = 'Hello! This is a test email.';$headers = 'From: no-reply@mysite.ru' . "\\r" .    'Reply-To: support@mysite.ru' . "\\r" .    'X-Mailer: PHP/' . phpversion();

if (mail($to, $subject, $message, $headers)) {    echo 'Email sent';} else {    echo 'Sending error';}?>

Disadvantages of mail()

No support for HTML emails (you need to manually specify Content-Type: text/html)
Inability to attach files without complex MIME manipulations
No encryption or SMTP authentication
Emails often end up in spam due to missing proper headers
Difficult to debug errors

For modern projects, mail() is not recommended. It is better to use specialized libraries.

2. PHPMailer — The Gold Standard

PHPMailer is the most popular library for sending email in PHP. It supports SMTP, SSL/TLS, HTML emails, attachments, alternative text, multiple recipients, and much more. It is installed via Composer:

composer require phpmailer/phpmailer

Example of Sending via SMTP (Gmail)

<?phpuse PHPMailer\\PHPMailer\\PHPMailer;use PHPMailer\\PHPMailer\\SMTP;use PHPMailer\\PHPMailer\\Exception;

require 'vendor/autoload.php';

$mail = new PHPMailer(true);

try {    // Server settings    $mail->SMTPDebug = SMTP::DEBUG_SERVER;    $mail->isSMTP();    $mail->Host       = 'smtp.gmail.com';    $mail->SMTPAuth   = true;    $mail->Username   = 'your@gmail.com';    $mail->Password   = 'your-app-password'; // app password    $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;    $mail->Port       = 465;

    // Sender and recipients    $mail->setFrom('from@example.com', 'Sender');    $mail->addAddress('user@example.com', 'Recipient');    $mail->addReplyTo('info@example.com', 'Information');

    // Attachments (optional)    $mail->addAttachment('/path/to/file.pdf', 'document.pdf');

    // Content    $mail->isHTML(true);    $mail->Subject = 'Email Subject';    $mail->Body    = '<h1>Hello!</h1><p>This email contains <b>HTML</b>.</p>';    $mail->AltBody = 'Hello! This is the text version of the email.';

    $mail->send();    echo 'Email sent';} catch (Exception $e) {    echo "Error: {$mail->ErrorInfo}";}?>