On the fly Thumbnail Generation

[Anon]

Hi,
how would i create a function that takes a jpeg input and outputs the same image but as a small thumbnail image
ideally i would like to call the function like this:

$thumb = thumbnail($input);

thanks
foo

[znouza]

easiest way is to use 'convert' command. it's ImageMagick program.. and to create thumbnail you should try

convert -geometry 10%> image1.jpg thumbnail.jpg

and use this with system()/exec() or $a=command..

[Anon]

when i say on the fly i mean that i dont want other files being created in the process

[znouza]

so
<?

load existing jpeg

$src_img = imagecreatefromjpeg($imagefile);

compute 25% of it's width/height

$new_w = imagesx($src_img)/4;
$new_h = imagesy($src_img)/4;

create new thumbnail image

$dst_img = imagecreate($new_w,$new_h);

anc copy original jpeg and resize it

imagecopyresized($dst_img,$src_img,0,0,0,0,$new_w,$new_h,imagesx($src_img),imagesy($src_img));

save new thumbnail

imagejpeg($dst_img, "scratch/$imagefile");
echo "<img src=scratch/$imagefile>\n";
?>

it's good enough?🙂

[Anon]

thanks alot dude
perfect 🙂