Image Re-Size Script Not Working Right

[Volitics]

The script below does not work right. I got it from the PHP Manual. It's a script that someone wrote. You can see it about half-way down the page.

http://us3.php.net/imagecopyresized

It works real good with jpeg and png images. It doesn't work with gif and bmp images.

It downsizes jpeg and png images just fine. With gif images it doesn't do anything with the image - doesn't even touch it. With bitmaps it will wipe all of the information off of the file.

function resize_jpg($img,$w,$h){

  $thumb = imagecreate ($w, $h);
  $image = ImageCreateFromJPEG($img);

  $imagedata = getimagesize($img);

  imagecopyresized ($thumb, $image, 0, 0, 0, 0, $w, $h, $imagedata[0], $imagedata[1]);

  imagejpeg($thumb, $img);
return;
}

resize_jpg("test1.jpg",100,100);

I would appreciate any assistance that anyone could provide.

Thanks

[LordShryku]

http://www.php.net/manual/en/ref.image.php

The format of images you are able to manipulate depend on the version of GD you install, and any other libraries GD might need to access those image formats. Versions of GD older than gd-1.6 support GIF format images, and do not support PNG, where versions greater than gd-1.6 support PNG, not GIF.

[Volitics]

LordShryku

Thanks for the help.

My hosting says :

GD Version bundled (2.0.12 compatible)

Guess what I'll have to do is just let folks upload only jpeg and png images and forget about gif images and bmp images.

Thanks again.