Home/ Questions/Q 665839
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-13T23:45:09+00:00

there is one think, i can’t understand anyway:((( when i try to set cookie(it

  • 0

there is one think, i can’t understand anyway:(((
when i try to set cookie(it is on line 28 in login.php), browser returns me an error!!!

Cannot modify header information – headers already sent by (output started at C:\xampp2\htdocs\video\index.php:9) in C:\xampp2\htdocs\video\login.php on line 28

but on line 9 in index php, i haven’t any header!!! there is a tag!!!
i cant understand it!!! can somebody tall me why it returns me such error?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Cookies are sent as headers. From the PHP docs for setcookie:

    setcookie() defines a cookie to be sent along with the rest of the HTTP headers. Like other headers, cookies must be sent before any output from your script (this is a protocol restriction). This requires that you place calls to this function prior to any output, including and tags as well as any whitespace.

    Also, if your page is saved in UTF-8 format, the BOM (Byte Order Mark) will stop you from being able to set any headers, as it counts as output. See http://bugs.php.net/bug.php?id=22108. To get around this you need to save your file without the byte order mark.

    See also: Byte order mark#Unwanted BOMs – Wikipedia

    • 0