PHP GD, cannot modify headers, already sent

Asked Mar 10 '16 at 20:14

Active Mar 10 '16 at 20:15

Viewed 28 times

Im trying to merge two images together with PHP GD so that it is used as a single image, but I keep hitting rock bottom every time, I've looked everywhere into it and I cant seem to find an issue here, any clues?

<?php
$dest = imagecreatefrompng('base.png');
$src = imagecreatefromjpeg('cover.jpg');

imagealphablending($dest, false);
imagesavealpha($dest, true);
imagecopymerge($dest, $src);

header('Content-Type: image/png');

imagepng($dest);
imagedestroy($dest);
imagedestroy($src);
?>

When executed, all that is seen is Cannot modify header information - headers already sent by, followed by from what I guess is plain text PNG. Any clues?

edited Mar 10 '16 at 20:15

j08691

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asked Mar 10 '16 at 20:14

Ben Whindle

4

Is there a space or return in front of your `` tag? – Poul Kruijt Mar 10 '16 at 20:17
Just to check this I removed _all_ spaces where possible, still the same error. – Ben Whindle Mar 10 '16 at 20:24
1

The error tells you there is some content being sent before the `header` call is reached. Since you say there's nothing before your ` – lafor Mar 10 '16 at 20:25
With something like this? 'header('Content-type: text/plain; charset=utf-8');' – Ben Whindle Mar 10 '16 at 20:28
No, I mean the encoding of your actual script file, the one with the code you're showing us. – lafor Mar 10 '16 at 20:33
Gave me a completely but smaller bunch of plain txt – Ben Whindle Mar 10 '16 at 20:36
@BenWhindle Just google `remove bom from file` – Poul Kruijt Mar 10 '16 at 21:04

PHP GD, cannot modify headers, already sent

0 Answers0