Send Admin Emails to Multiple Email Addresses

Question

Is there a hook that would allow me to email multiple email addresses for the default admin email notifications?

I was hoping I could build an array:

$adminEmails = array('me1@example.com', 'me2@example.com');

Then have all admin emails (like new user notifications) sent to $adminEmails

Possible?

Answer 1

Try this:

update_option( 'admin_email', 'me1@example.com, me2@example.com' );

Note that the value is a string; open and close quotes only!

Answer 2

This can be done by filtering the wp_mail function, checking if to is set to the admin email, and if so, add your additional emails addresses, and return args back to wp_mail

add_filter( 'wp_mail', 'my_custom_to_admin_emails' );

/**
 * Filter WP_Mail Function to Add Multiple Admin Emails
 *
 *
 *
 * @param array $args A compacted array of wp_mail() arguments, including the "to" email,
 *                    subject, message, headers, and attachments values.
 *
 * @return array
 */
function my_custom_to_admin_emails( $args ) {
    // If to isn't set (who knows why it wouldn't) return args
    if( ! isset($args['to']) || empty($args['to']) ) return $args;

    // If TO is an array of emails, means it's probably not an admin email
    if( is_array( $args['to'] ) ) return $args;

    $admin_email = get_option( 'admin_email' );

    // Check if admin email found in string, as TO could be formatted like 'Administrator <admin@domain.com>',
    // and if we specifically check if it's just the email, we may miss some admin emails.
    if( strpos( $args['to'], $admin_email ) !== FALSE ){
        // Set the TO array key equal to the existing admin email, plus any additional emails
        //
        // All email addresses supplied to wp_mail() as the $to parameter must comply with RFC 2822. Some valid examples:
        // user@example.com
        // User <user@example.com>
        $args['to'] = array( $args['to'], 'another@domain.com', 'Admin4 <admin4@domain.com>' );
    }

    return $args;
}

We return the TO as an array, as wp_mail will handle the array and explode it as needed to send the email

Answer 3

Here's my solution, it uses the update_option_* filter, I believe it to be the right way to go here. add this to a plugin or your theme functions.php file, and then you can safely put comma separated admin emails in the settings->general screen.

add_filter('pre_update_option_admin_email','sanitize_multiple_emails',10,2);

function sanitize_multiple_emails($value,$oldValue)
{
    //if anything is fishy, just trust wp to keep on as it would.
    if(!isset($_POST["admin_email"]))
        return $value;

    $result = "";
    $emails = explode(",",$_POST["admin_email"]);
    foreach($emails as $email)
    {
        $email = trim($email);
        $email = sanitize_email( $email );

        //again, something wrong? let wp keep at it.
        if(!is_email($email))
            return $value;
        $result .= $email.",";

    }

    if(strlen($result == ""))
        return $value;
    $result = substr($result,0,-1);

    return $result;
}