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I just moved a site I built from my development server to the clients server and am having an issue I can't figure out. I have a class file that handle's uploading and deleting images. When the user uploads an image I do a header redirect when the action has been successful like so:

$message = urlencode('Your slide has been updated');
header('Location: ' . $cms->base_url . '?page=' . 
$_GET['page'] . '&message=' . $message);

On the development site this works just fine, but on the live site I get the "Cannot modify header. Header already set" error message. I have spent a lot of time researching solutions but haven't found anything. Any idea's of why this works on one server but not on the other? I have already read this: How to fix "Headers already sent" error in PHP

Brian
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  • Not sure why this was marked as a duplicate question. The question is why does this happen on one server and not another? – Brian Jan 03 '18 at 18:19
  • I would guess php.ini differs from one server to another. specifically output buffering settings. – Tim G Jan 03 '18 at 18:51
  • The question does not necessarily have to be equal. What it says it that an answer can be found there. (I have not checked if that's the case) – klutt Jan 03 '18 at 21:57

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