thumbnails with php

[W. Paulisse]

hy all,

i am complety new to GD and i must have a code within 2 days that does the
following for me

- Upload an image (jpg / png / gif) and save it on the server.
- Create an thumbnail of that image with a width and height of 100
- save the thumbnail on the server aswell

Can someone please help me on this or could give me a url with a good and
quick explanation how to handle GD?

Thx in advance,
wouter

[Janwillem Borleffs]

"W. Paulisse" <ihate@spam.nl> schreef in bericht
news:3f5589ef$0$49106$e4fe514c@news.xs4all.nl...

>
> Can someone please help me on this or could give me a url with a good and
> quick explanation how to handle GD?
>

[url]http://www.php.net/gd[/url]

Read it thouroughly and look ate the examples. I have prepared a quick and
dirty demo for you at the following location:

[url]http://www.jwscripts.com/playground/thumb.php[/url]

Just copy this into a local file and adjust the $path variable to suit your
environment.


JW

[matty]

W. Paulisse wrote:

> hy all,
>
> i am complety new to GD and i must have a code within 2 days that does the
> following for me
>
> - Upload an image (jpg / png / gif) and save it on the server.
> - Create an thumbnail of that image with a width and height of 100
> - save the thumbnail on the server aswell
>
> Can someone please help me on this or could give me a url with a good and
> quick explanation how to handle GD?
>
> Thx in advance,
> wouter

I have a script that will do this, but not for free!

It's not bad though - it'll handle jpeg and png files, let you resize to an
arbitrary size, add a text overlay (if you want), automatically create landscape/
protrait thumbs according to source image size (if wanted), and save the file under
a unique name on the server...

If you'd like to license it, let me know!

Matt

[Martin Tollefsen]

W. Paulisse wrote:

> i am complety new to GD and i must have a code within 2 days that
> does the following for me
>
> - Upload an image (jpg / png / gif) and save it on the server.
> - Create an thumbnail of that image with a width and height of 100
> - save the thumbnail on the server aswell
>
> Can someone please help me on this or could give me a url with a good
> and quick explanation how to handle GD?

Guide on how to create your own in minutes (!?):
[url]http://www.sitepoint.com/article/1195/2[/url]

[John Murtari]

"W. Paulisse" <ihate@spam.nl> writes:

> hy all,
>
> i am complety new to GD and i must have a code within 2 days that does the
> following for me
>
> - Upload an image (jpg / png / gif) and save it on the server.
> - Create an thumbnail of that image with a width and height of 100
> - save the thumbnail on the server aswell
>
> Can someone please help me on this or could give me a url with a good and
> quick explanation how to handle GD?
>

Here are two function that do part of what you want:


# Function CreateThumbnail - creates the thumbnail version
# of a photo at a fixed size (81 high and correct width)
# INPUT - sourcefile name, targetfile name (thumbnail)
# OUTPUTS - new file in targetfile location
# RETURNS - 0 on success, message otherwise
#
function CreateThumbnail ($sourcefile, $targetfile) {


$desiredY = 81;

// Get the dimensions of the source picture
$picsize=getimagesize("$sourcefile");

if ($picsize == false) { // failed
return("Could not get size on picture $sourcefile");
}

$source_x = $picsize[0];
$source_y = $picsize[1];

$ratio = $desiredY / $source_y;

$newX = (int) ($ratio * $source_x);
$newY = (int) ($ratio * $source_y);


if ($msg = ResizeToFile($sourcefile, $newX, $newY, $targetfile)) {
return("Resize failed to targetfile: $targetfile ($msg)");
}

return(0);

}



/* Function: resizeToFile resizes a picture and writes it to the harddisk
*
* $sourcefile = the filename of the picture that is going to be resized
* $dest_x = X-Size of the target picture in pixels
* $dest_y = Y-Size of the target picture in pixels
* $targetfile = The name under which the resized picture will be stored
* $jpegqual = The Compression-Rate that is to be used
*/
function ResizeToFile ($sourcefile, $dest_x, $dest_y, $targetfile, $jpegqual=60)
{

/* Get the dimensions of the source picture */
$picsize=getimagesize("$sourcefile");
if ($picsize == false) {
return("Could not get size on file: $sourcefile\n");
}

$source_x = $picsize[0];
$source_y = $picsize[1];

$source_id = imageCreateFromJPEG("$sourcefile");

if (! $source_id) {
return("Could not create image from jpeg file: $sourcefile\n");
}

/* Create a new image object (not neccessarily true colour) */
$target_id=imagecreatetruecolor($dest_x, $dest_y);

/* resize the original picture and copy it into the just created image
object. Because of the lack of space I had to wrap the parameters to
several lines. I recommend putting them in one line in order keep your
code clean and readable
*/
$target_pic=imagecopyresampled($target_id,$source_ id,
0,0,0,0,
$dest_x,$dest_y,
$source_x,$source_y);

/* Create a jpeg with the quality of "$jpegqual" out of the
image object "$target_pic".
This will be saved as $targetfile */
$stat = imagejpeg ($target_id,"$targetfile" ,$jpegqual);
if (! $stat) {
return("Failed to create new image file: $targetfile");
}

return 0;


} // end function ResizeToFile


Hope this helps!

--
John
__________________________________________________ _________________
John Murtari Software Workshop Inc.
[email]jmurtari@thebook.com[/email] 315.635-1968(x-211) "TheBook.Com" (TM)
[url]http://www.thebook.com/[/url]