Posted by Erwin Moller on 01/30/07 15:21

Gunnar G wrote:

> Hi.
>
> I've created an image with this code
>
> Header("Content-Type: image/png");
> $image = ImageCreate($W,$H);
> $white = ImageColorAllocate($image,255,255,255);
> $black = ImageColorAllocate($image,0,0,0);
> ImageLine($image,0,0,$W,$H,$black);
> ImagePng($image);
> ImageDestroy($image);
>
> but now I wish to add a line
>
> echo "Hello";
>
> before the image code, then I only get garbage, the header command is
> probably invalid now. So how do I create the image without having to save
> the image to a file?

Hi Gunnar,

Your code should return html OR an image.
It cannot return both because they have different mimetypes.

So you need a script that returns html OR an image, not both.

A trick to debug your imagecreationscript is changing you
Header("Content-Type: image/png");
to
Header("Content-Type: text/html");

so you can see errors in your PHP-code.

Of course you'll have to put it back to the original when you think the
imagecreationscript runs fine.

Regards,
Erwin Moller

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