How to mark the emails as spam and not spam in PHP? - php

Question

I am working on my PHP code to mark my emails as spam and not spam. I need some help with the code, because I am not sure which variable I should use to send the report to spamassassin to mark my emails as spam and not spam.
I am using the script from this link:
https://samprasanna.blogspot.com/2017/06/php-api-to-spamassassin-spamd-protocol.html
Here is the code:
<?php
ini_set('display_errors', '1');
ini_set('display_startup_errors', '1');
error_reporting(E_ALL);
require_once('Mail.php');
require_once('Mail/IMAPv2.php');
require('Spamassassin/Client.php');
require('Spamassassin/Client/Result.php');
// Connect to the server:
$username = 'username';
$password = 'tester;
$params = array(
    "hostname" => "localhost",
    "port" => "783",
    "user" => "user");
$sa = new Spamassassin\Client($params);
$inbox = '{imap.domain.com:993/imap/ssl/novalidate-cert}INBOX';
$inbox = imap_open($inbox, $username, $password) or die("Can't connect: " . imap_last_error());
$email_number = '121';
$message = imap_fetchbody($inbox, $email_number, "", FT_UID);
$header = htmlspecialchars(imap_fetchbody($inbox, $email_number, "", FT_UID|FT_PEEK));
?>
It works fine, but I need some help with this:
$sa->report($message)
Report message as spam, both local and remote
And this:
$sa->revoke($message)
Revokes a message previously reported as spam
When I send the report to spamassassin, which variable do I have to use $message or $header to report the email as spam and not spam??
Do I have to use $message or $header when send report to spamassassin??
I guess I would have to use the $header variable when I report the emails as spam and not spam but I am not really sure.
Any advice would be much appreciated.