php error with correct syntax: Warning: Cannot modify header information - headers already sent by

Question

It gives me this error

Warning: Cannot modify header information - headers already sent by (output started at /media/maksim/LENOVO/github/server/pages/settings.php:34) in /media/maksim/LENOVO/github/server/pages/header.php on line 211

Here is that line of code and I know it has to be that one because it works when I remove it.

<option value="0" <?php if ($nightthemeis == 0) {echo "selected";} ?> >Off</option>

Show the entire header.php file (minus any passwords of course); — Difster, Jul 05 '17 at 00:59

score 0 · Answer 1 · answered Jul 05 '17 at 01:03

0

You have got to be using the echo statement before :

header(), session_start(), setcookie()

when it should be afterward,

answered Jul 05 '17 at 01:03

user10089632

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Look at the full script online. I have a lot of echo before the one that had the problem. – Maks Jul 05 '17 at 02:16

php error with correct syntax: Warning: Cannot modify header information - headers already sent by

1 Answers1