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Posted by pek on 12/18/72 11:51
I don't want to output the thumbnail. I simply want to create a
thumbnail with this function. I call this function from a page where I
upload a photo, create a thumbnail out of it, save some changes to the
database, and then redirect to the homepage. If I want to see the
uploaded image I simply find it under "photos/uploadedimg.jpg" and
"photos/thumbnails/uploadedimg.jpg" (the second is created with this
function).
frizzle wrote:
> pek wrote:
> > I created a file name image.php which contains only the following code:
> >
> > <?php
> > function createThumbnail($picture,$thumb,$new_w,$new_h) {
> > $extension=substr($picture,strrpos($picture,".")+1);
> > switch (strtolower($extension)) {
> > case "jpg":
> > case "jpeg":
> > $src_img=imagecreatefromjpeg($picture);
> > break;
> > case "png":
> > $src_img=imagecreatefrompng($picture);
> > break;
> > case "gif":
> > $src_img=imagecreatefromgif($picture);
> > break;
> > case "bmp":
> > $src_img=imagecreatefromwbmp($picture);
> > break;
> > }
> >
> > $old_x=imagesx($src_img);
> > $old_y=imagesy($src_img);
> >
> > if ($old_x > $old_y) {
> > $thumb_w=$new_w;
> > $thumb_h=$old_y*($new_h/$old_x);
> > }elseif ($old_x < $old_y) {
> > $thumb_w=$old_x*($new_w/$old_y);
> > $thumb_h=$new_h;
> > }else{
> > $thumb_w=$new_w;
> > $thumb_h=$new_h;
> > }
> >
> > $dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
> > imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
> >
> >
> > switch (strtolower($extension)) {
> > case "jpg":
> > case "jpeg":
> > imagejpeg($dst_img,$thumb);
> > break;
> > case "png":
> > imagepng($dst_img,$thumb);
> > break;
> > case "gif":
> > imagegif($dst_img,$thumb);
> > break;
> > case "bmp":
> > imagewbmp($dst_img,$thumb);
> > break;
> > }
> >
> > imagedestroy($dst_img);
> > imagedestroy($src_img);
> > }
> > ?>
> >
> > This function successfully creates a thumbnail. The problem is that I
> > include it in another page (with include_once, just if it matters)
> > which creates a thumbnail, makes some db updates and then redirects to
> > another page. When trying to redirect with header("Location:
> > index.php"); it echos that header has already been sent from image.php.
> > The problem appears immediatly on include (I deleted the code that
> > calls the function to test it).
> > I think it is because I am using imagejpg(); function which outputs to
> > the browser but I don't know how to change this.
> > Thanks in advance
> >
> > -pek
> >
> > P.S. I know my coding skills are awful, so if there is anyone
> > suggesting to change the way I create the thumbnail please do.
>
> If you actually want to display the image, you should call it as if it
> were a real one:
> <img src="image.php?vars" > in the html, not include it in another PHP
> file.
>
> Anyway, does the error give you a line or something? It appears because
> text/whitespace is already outputted before the image is ...
>
> Frizzle.
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