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    Add progress bar
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    Please note this is an old forum thread. Information in this post may be out-to-date and/or erroneous.
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    Posted by admin  · 19-02-2018 - 08:05

    Hello,

    The following error:

    Cannot modify header information - headers already sent by

    is from PHP. PHP can't display output before using the header function; from http://php.net/manual/en/function.header.php:

    Remember that header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP.

    We recommend you to check your script to find where it's getting any output before the header.

    Regards.