File Upload Problem with Thumbnails

[callieandmark]

I have a very simple file upload script which creates a thumbnail of
the file (jpg) upon uploading. This works fine with small images,
however, if i try to upload a file over about 1mb the thumbnail
dosen't show. Any ideas ?
Thanks for any advice.

[Mike Roetgers]

ca***********@yahoo.co.uk schrieb:

I have a very simple file upload script which creates a thumbnail of
the file (jpg) upon uploading. This works fine with small images,
however, if i try to upload a file over about 1mb the thumbnail
dosen't show. Any ideas ?
Thanks for any advice.

Maybe post_max_size is set to 1M in your php.ini?

[callieandmark]

No, the post_max is set at 8M
Thanks

[shimmyshack]

On 26 Mar, 15:06, "[e-mail]"
<[e-mail]:

No, the post_max is set at 8M
Thanks

advice is to post your code for better answers.
Do you use exif data to create the thumb, perhaps the larger jpgs
don't have that info, etc.. just guesses at this point.

[delishus]

On Mar 26, 5:53 am, "[e-mail]"
<[e-mail]:

I have a very simple file upload script which creates a thumbnail of
the file (jpg) upon uploading. This works fine with small images,
however, if i try to upload a file over about 1mb the thumbnail
dosen't show. Any ideas ?
Thanks for any advice.

You also need to check the size of your upload_max_filesize in the
php.ini - if your post_max is 8M, then your upload_max is probably
only 2M.

[callieandmark]

The upload max is 20M.
If i try to upload a large file (over 1mb) it uploads fine, its just
that the thumbnail is not created.

The code is :
$tsize = "300"; //thumbnails size (pixel)
$path = "uploads/"; //image path, where the images should be
uploaded to
$tpath = "thumbs/"; //your thumbnails path
$name="$uploaded_file_name";
$imgf = "$uploaded_file_name";
$thbf = $tpath.$imgf;
function createthumb($name,$filename,$new_w,$new_h){
$system=explode('.',$name);
if (preg_match('/jpg|jpeg|JPG/',$system[1])){
$src_img=imagecreatefromjpeg($name);
}
if (preg_match('/png|PNG/',$system[1])){
$src_img=imagecreatefrompng($name);
}
if (preg_match('/gif|GIF/',$system[1])){
$src_img=imagecreatefromgif($name);
}

$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x $old_y) {
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x < $old_y) {
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y) {
$thumb_w=$new_w;
$thumb_h=$new_h;
}

$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thum b_w,$thumb_h,$old_x,
$old_y);
if (preg_match("/png/",$system[1]))
{
imagepng($dst_img,$filename);
}
if (preg_match("/gif/",$system[1]))
{
imagegif($dst_img,$filename);
}
else {
imagejpeg($dst_img,$filename);
}
imagedestroy($dst_img);
imagedestroy($src_img);
}
createthumb($path.$imgf,$tpath.$imgf,$tsize,$tsize );

[Willem Bogaerts]

I have a very simple file upload script which creates a thumbnail of

the file (jpg) upon uploading. This works fine with small images,
however, if i try to upload a file over about 1mb the thumbnail
dosen't show. Any ideas ?
Thanks for any advice.

Does the full jpg gets uploaded properly? In that case, it is not in the
upload settings.

I guess that you use the gd image functions. In that case, note that a
jpg is a compressed image. To work with it, it must be uncompressed. If
you want to resample it, you'd probably have both the original and the
target uncompressed in memory at some point. If you configure PHP to use
only a limited amount of memory, that memory may be too little, even if
the uploaded file is not that big. Does increasing the memory limit help?

Best regards,
--
Willem Bogaerts

Application smith
Kratz B.V.
http://www.kratz.nl/

[shimmyshack]

On 26 Mar, 15:48, Willem Bogaerts
<[e-mail]:

I have a very simple file upload script which creates a thumbnail of
the file (jpg) upon uploading. This works fine with small images,
however, if i try to upload a file over about 1mb the thumbnail
dosen't show. Any ideas ?
Thanks for any advice.

Does the full jpg gets uploaded properly? In that case, it is not in the
upload settings.

I guess that you use the gd image functions. In that case, note that a
jpg is a compressed image. To work with it, it must be uncompressed. If
you want to resample it, you'd probably have both the original and the
target uncompressed in memory at some point. If you configure PHP to use
only a limited amount of memory, that memory may be too little, even if
the uploaded file is not that big. Does increasing the memory limit help?

Best regards,
--
Willem Bogaerts

Application smith
Kratz B.V.http://www.kratz.nl/

uploads are slow, i think this is a max execution problem time
problem, as you script works fine and fast for 2-3MB files, tested on
15MB file - /then/ the memory was high, but otherwise pretty small.
2*1024^2 / 30 is about 500kbits/s which is kinda what you expect the
wrong end of ADSL to be - the upper limit for us poor UK'rs

[shimmyshack]

On 26 Mar, 15:48, Willem Bogaerts
<[e-mail]:

I have a very simple file upload script which creates a thumbnail of
the file (jpg) upon uploading. This works fine with small images,
however, if i try to upload a file over about 1mb the thumbnail
dosen't show. Any ideas ?
Thanks for any advice.

Does the full jpg gets uploaded properly? In that case, it is not in the
upload settings.

I guess that you use the gd image functions. In that case, note that a
jpg is a compressed image. To work with it, it must be uncompressed. If
you want to resample it, you'd probably have both the original and the
target uncompressed in memory at some point. If you configure PHP to use
only a limited amount of memory, that memory may be too little, even if
the uploaded file is not that big. Does increasing the memory limit help?

Best regards,
--
Willem Bogaerts

Application smith
Kratz B.V.http://www.kratz.nl/

well of course 2*8*1024^2/30 !

[callieandmark]

Mx execution time is set at 50000 which i believe is a pretty long
time ?

[callieandmark]

Oh, and memory limit is 40M

[shimmyshack]

On 26 Mar, 17:04, "[e-mail]"
<[e-mail]:

Mx execution time is set at 50000 which i believe is a pretty long
time ?

yes it is!! Hmmm a mystery!
Have you checked the bug database for your version, Im using latest
php as module in the latest apache version, there are known bugs for
all kinds of functions, if you problem were at around the 2MB mark I
would have one in mind from a case I looked at in php4 for instance.

All we have done so far is check the process script, which I am
assuming you have run independently of the upload script, as you have
verified the upload as working with large files.

What OS are you on, you could trace the HDD activity with filemon if
on windows, that often shows up good stuff.

I do note that the way you grab the filename assumes things about them
- only one period - which I assume is because you are in total control
of their names when uploaded.