function imagecreatefromjpeg()
| From: | PHP | Date: | Wed, 12 May 2004 08:48:24 +0000 |
| Subject: | function imagecreatefromjpeg() | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-185956@lists.php.net to get a copy of this message | ||
Hello,
I use the function imagecreatefromjpeg() to create thumbnails of my
pictures.
This is the code I use :
<?php
function thumbnail($i,$nw,$p,$nn) {
$img=imagecreatefromjpeg("$i");
$ow=imagesx($img);
$oh=imagesy($img);
$scale=$nw/$ow;
$nh=ceil($oh*$scale);
$newimg=imagecreate($nw,$nh);
imagecopyresized($newimg,$img,0,0,0,0,$nw,$nh,$ow,$oh);
imagejpeg($newimg, $p.$nn);
return true;
}
#thumbnail(filetouse,newwidth,newpath,newname);
thumbnail("/img/x.jpg",100,"/img/thm/","xt.jpg");
?>
It works for some of my pictures, but with some pictures the result is an
imagefile with filesize zero. When I check the log files then I see that
these lines has occured:
[11-May-2004 23:16:15] PHP Warning: imagecreatefromjpeg() [<a
href='http://www.php.net/function.imagecreatefromjpeg'>function.imagecreatef
romjpeg</a>]: '/home/infos/domalle/miweb/pizias/photodir/6.jpg' is not a
valid JPEG file in /home/infos/domalle/miweb/pizias/TestOnResize2/resize.php
on line 42
[11-May-2004 23:16:15] PHP Warning: imagesx(): supplied argument is not a
valid Image resource in
/home/infos/domalle/miweb/pizias/TestOnResize2/resize.php on line 43
[11-May-2004 23:16:15] PHP Warning: imagesy(): supplied argument is not a
valid Image resource in
/home/infos/domalle/miweb/pizias/TestOnResize2/resize.php on line 44
[11-May-2004 23:16:15] PHP Warning: Division by zero in
/home/infos/domalle/miweb/pizias/TestOnResize2/resize.php on line 45
[11-May-2004 23:16:15] PHP Warning: imagecopyresized(): supplied argument
is not a valid Image resource in
/home/infos/domalle/miweb/pizias/TestOnResize2/resize.php on line 49
The only difference that I can find between imagefiles with which it works
and the ones where it does not work is the filesize.
An image file with which it works : 60 Kb
An image file with which it doesn't work : 1400 Kb
Could someone please advice me on a solution that works in all cases ?
Thanks in advance,
Dominique