Unwanted new line returned after AJAX request

Question

I\'m using an ajax request to send comments to DB. Succesful response is marked by

1. OK

The problem actually is that the response from the

Answer 1

I fixed by these

1. Make sure there is nothing, preceeding the opening
2. Make sure there are no trailing characters / lines after the closing ?>
3. Check to see if a ?> tag exists somewhere in the lines of code (follow flow from your __construct and where you invoke stuff)