如何配置WAMP(localhost)以使用Gmail发送电子邮件？

<?php
$to = "recipient@example.com";
$subject = "Test email";
$message = "This is a test email.";
$headers = "From: your_email@gmail.com" . "\r\n" .
    "Reply-To: your_email@gmail.com" . "\r\n" .
    "X-Mailer: PHP/" . phpversion();

$username = 'your_email@gmail.com';
$password = 'your_password';

// Create a secure SSL connection to Gmail
$smtp_url = "ssl://smtp.gmail.com";
$smtp_port = "465";

// Create a new connection
$connection = fsockopen($smtp_url, $smtp_port, $errno, $errstr, 30);

if (!$connection) {
    echo "Error: $errno - $errstr";
} else {
    echo "Connected to Gmail.\n";

    // Authenticate with Gmail
    fputs($connection, "AUTH LOGIN\r\n");
    fputs($connection, base64_encode($username) . "\r\n");
    fputs($connection, base64_encode($password) . "\r\n");

    // Send the email
    fputs($connection, "MAIL FROM: $username\r\n");
    fputs($connection, "RCPT TO: $to\r\n");
    fputs($connection, "DATA\r\n");
    fputs($connection, "Subject: $subject\r\n");
    fputs($connection, "$message\r\n");
    fputs($connection, ".\r\n");
    fputs($connection, "QUIT\r\n");

    // Close the connection
    fclose($connection);
}
?>