Cannot modify header

cesarcesar

I have a page I'm calling headers on. I'm getting the error

PHP Warning: Cannot modify header information - headers already sent by

So i use headers_sent() to see where the issue is. It says line 1. At line 1 I only have a <?php on the line with NO white space before it. more test.. same error. I then remove everything and only have one line of code with a header(Location:http://www.blabla.com) on line 1. Again no white space before or after PHP. Still the same error.

Why is this happening? Why are my headers failing? Thanks much.

sagee

please post your code

Weedpacket

[man]headers_sent/man doesn't give you a line number, it just tells you whether headers have already been sent or not.

The error message should give you a line number where your output started.

If that says line 1 then there's a possibility that some text editor you've used recently has stuck a Byte-Order Mark at the start of the file.

cesarcesar

Weedpacket wrote:
[man]headers_sent/man doesn't give you a line number, it just tells you whether headers have already been sent or not.

fROM php.net

// An example using the optional file and line parameters, as of PHP 4.3.0
// Note that $filename and $linenum are passed in for later use.
// Do not assign them values beforehand.
if (!headers_sent($filename, $linenum)) {
header('Location: http://www.example.com/');
exit;

My code is fine im sure.

cesarcesar

Found the problem. Thanks to all those that helped.

Basically there was some type of invisible character in the beginning of my file. I copied all of the file but the first and last character, then pasted into a new doc. Saved over the old doc and it works!

I'm using EditPlus3 text editor in case anyone knows why this invisible char was added.

bradgrafelman

As Weedpacket noted, this character at the beginning of the file is the BOM marker in the Unicode character set. Your editor must not have been setup to save the file without this "signature".

Don't forget to mark this thread resolved.

Weedpacket

cesarcesar wrote:
My code is fine im sure.

Have to take your word for it; I could only go on what your description of it was.