You use a hook for the custom mail HTML and render the template to a string and return it instead.
add_filter( 'wp_new_user_notification_email', 'custom_wp_new_user_notification_email', 10, 3 );
function custom_wp_new_user_notification_email( $wp_new_user_notification_email, $user, $blogname ) {
$message = \App\template('emails/welcome', compact('user', 'blogname'));
$wp_new_user_notification_email['message'] = $message;
return $wp_new_user_notification_email;
}
In this (admittedly untested) example the blade template receives the $user
and $blogname
variables and the rendered template is used as the email message.
Is this a Sage 9 or Sage 10 theme (Sage 10 template rendering)?