Hi everyone,

I'm currently working on resizing an image that the user wants uploaded as their avatar. The resizing will occur before the uploading.

At the moment I'm just testing the resizing script without uploading it. It works great, however I need to make it so it will work with all image formats (at least the basics - jpg, png, gif, bmp). In the code below I tried changing the .jpeg and .jpg areas to .gif (abc.jpg Is Now abc.gif, image/jpeg Is Now image/gif, imagejpeg($thumb) is Now imagegif($thumb)), but it is giving me this error: "The image “http://www.mysite.com/testdelete.php” cannot be displayed, because it contains errors.".
The weird thing is, this error message is actually an image.

Am I going about this the right way? In the end, I will be needing to capture the resized picture in a variable to show to users on various pages. I noticed by using imagejpeg($thumb) it immediately shows it to the screen, but I would rather capture this into a variable to show in different areas of the page.

Any suggestions on where to go from here?

MySql Version 5.0.91
My Code:

PHP Code:

// File and new size
$filename = 'avatars/abc.gif';

// Content type

header('Content-type: image/gif');



// Get new sizes
list($width, $height) = getimagesize($filename);
$newwidth = 65;
$newheight = 65;

// Load
$thumb = imagecreatetruecolor($newwidth, $newheight);
$source = imagecreatefromjpeg($filename);

// Resize
imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

// Output
imagegif($thumb); 


Isn't going to happen with PHP which runs on the server, so until the image is uploaded it does not exist for PHP.

Alright, well once the image is uploaded to the server, how can I change the size of that image so the images aren't taking as much space?

HTTP/HTML form uploads the image

Apache stores the uploaded image into a temp directory

PHP reads the image file into memory using GD image functions

PHP resizes the image using GD image functions

PHP writes a new image file to a permanate location on the web server using GD image functions

(optional) PHP unlinks the temp uploaded image file

if you have imagemagick installed:

PHP Code:

$infile = $_FILES['userfile']['tmp_name']; // or whatever
$outfile = "/path/to/userpics/userpic.jpg"; // or whatever
$cmd = "convert '{$infile}' -scale '65x65>' -quality 90 '{$outfile}'";
exec($cmd);