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Posted by frizzle on 11/14/29 11:51
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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