Changes to stream.php

[Susan]

Hello. Could you please explain what the changes below fix or enhance?

- $_SESSION['response'] .= $data;
$_SESSION['response'] .= 'z9J7L0b42g32' .  $data;
}
return strlen($data);
};

curl_exec($ch);

$answer = "";
- $responsearr = explode("data: ", $_SESSION['response']);
$responsearr = explode("z9J7L0b42g32data: ", $_SESSION['response']);

Changes like this have blocked some functions within school intranet.