How can PHP be used to send emails with BCC recipients?

To send emails with BCC recipients using PHP, you can simply add the BCC email addresses to the additional_headers parameter of the mail() function. This parameter allows you to specify additional headers, including BCC recipients, in the email.

$to = 'recipient@example.com';
$subject = 'Test Email with BCC';
$message = 'This is a test email with BCC recipients';
$headers = 'From: sender@example.com' . "\r\n";
$bcc = 'bcc1@example.com, bcc2@example.com';
$headers .= 'Bcc: ' . $bcc . "\r\n";

mail($to, $subject, $message, $headers);