Displaying EXIF-Thumbnails?

In order to preview fotos I tried to read out the exif-pictures.

$exif_picture = exif_thumbnail($picture, $width, $height, $typ);
print("exif_width=" . $width);
print("exif_height=" . $height);

Here the width and height are printed correctly. But the following code
lines do not succeed:

header('Content-type: ' . image_type_to_mime_type($typ));
echo $exif_picture;

i.e. no picture is shown. Moreower the header-statement leads to the error

Cannot modify header information - headers already sent by (output started
at /home/www/webxyz/html/ausstellung_nav.php:6) in
/home/www/webxyz/html/ausstellung_nav.php on line 40


This error may be avoided when placing the header-statement just at the top
of the php-file. But even then thumbnails are not shown. Instead a lot of
letters are filling the screen.


Thanks for any help out
bahncompany.de
Udo Pecher

Re: Displaying EXIF-Thumbnails?

Udo Pecher wrote:
> In order to preview fotos I tried to read out the exif-pictures.
>
> $exif_picture = exif_thumbnail($picture, $width, $height, $typ);
> print("exif_width=" . $width);
> print("exif_height=" . $height);
>
> Here the width and height are printed correctly. But the following code
> lines do not succeed:
>
> header('Content-type: ' . image_type_to_mime_type($typ));
> echo $exif_picture;
>
> i.e. no picture is shown. Moreower the header-statement leads to the error
>
> Cannot modify header information - headers already sent by (output started
> at /home/www/webxyz/html/ausstellung_nav.php:6) in
> /home/www/webxyz/html/ausstellung_nav.php on line 40
>
>
> This error may be avoided when placing the header-statement just at the top
> of the php-file. But even then thumbnails are not shown. Instead a lot of
> letters are filling the screen.
>
>
> Thanks for any help out
> bahncompany.de
> Udo Pecher
>
>

You can send html or one image from a file - nothing more. HTTP
protocol doesn't allow it.

You need to call the image generator page with an img statement, i.e.



--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

Re: Displaying EXIF-Thumbnails?

Hallo Jerry
> You can send html or one image from a file - nothing more. HTTP protocol
> doesn't allow it.
>
> You need to call the image generator page with an img statement, i.e.
>
>
>


E.g. I applied

$exif_picture = exif_thumbnail(www.bahncompany.de/path/datei.jpg, $width,
$height, $typ);

echo "";

More precisely questioned: is the $exif_picture only a boolean variable? How
the small EXIF-image is extracted from a jpg-file?

Udo Pecher

Re: Displaying EXIF-Thumbnails?

Udo Pecher wrote:
> Hallo Jerry
>> You can send html or one image from a file - nothing more. HTTP protocol
>> doesn't allow it.
>>
>> You need to call the image generator page with an img statement, i.e.
>>
>>
>>
>
>
> E.g. I applied
>
> $exif_picture = exif_thumbnail(www.bahncompany.de/path/datei.jpg, $width,
> $height, $typ);
>
> echo "";
>
> More precisely questioned: is the $exif_picture only a boolean variable? How
> the small EXIF-image is extracted from a jpg-file?
>
> Udo Pecher
>
>
>

Read my comments again.

You are trying to download both html and an image in the same file.
HTTP does not allow this.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

Re: Displaying EXIF-Thumbnails?

Hi Jerry,
> Read my comments again.
>
Thank you for the advice! Bahncompany.de now runs with EXIF-thumbnails.

Udo Pecher