Warning: Cannot modify header information ...

[zzz]

I'm trying to incorporate a script withing an existing page. The script requires a class file.

As a result I keep getting error:

Warning: Cannot modify header information - headers already sent by (output started at.............. in ......../class.file.php on line 307

Here's the line 307: header("Content-type: image/jpeg");

Is there a simple work around this.

[stolzyboy]

you can't have any output to the browser before calling a header function, ie, html, whitespace, php outputting html, comments, etc...

[zzz]

Does it mean if I get that reguire ="file" and put it above all other includes it should help? It seems I've tried it earlier but unsuccessfully.

[stolzyboy]

regardless what it is, you just can't have anything output before that, so if you have an include before that, that has output in it, that will create problems, and i am assuming there is output before that since the error is on line 370

[zzz]

Yes, there's an output in that file. However the problem happens only if I put another include between that script. When I use this script with a call to a class file from a simple file, without putting includes it works just fine. Is there a way of substituting either that header call with something more forgiving?

[stolzyboy]

you can put

<?
ob_start();
?>

at the very beginning of the file (or included files, whichever is first)

and that will supress header errors