jpg thumbnail creation in PHP using GDlib Thread

read the title, I've tried a few methods but I'm sure there's an easy way to generate a thumbnail from a PHP script (e.g. <img src="thumb.php?img=fullsize.jpg">)

Try for thumb.php?img=picturelocation&scale=0.5 (where 'scale' could be a spinkee scalerizer!):

<?php
if(file_exists($img)) {} else { die("Image doesn't exist"); }

$orig_image = imagecreatefromjpeg($img);  //takes your picture
$orig_x = imagesx($orig_image);
$orig_y = imagesy($orig_image); //size in pixels of original picture

$x = $orig_x * $scale;
$y = $orig_y * $scale;
//just replace $x,$y with values if thumbs are fixed size, e.g. 200x150 instead of 50% size
$sm_image = Imagecreate($x,$y); //creates a new blank thumbnail

Imagecopyresampled($sm_image,$orig_image,0,0,0,0,$x,$y,$orig_x,$orig_y);
//resizes the big pic and copies it into your blank thumbnail

Header("Content-type: image/jpeg"); //so your browser knows it's a picture
imageJPEG($sm_image); //shows the picture itself
?>

(I haven't tested this though!)
You might want to use an 'imagedestroy' command after too, but it's quicker to store thumbnails and recall than make them on the fly- have something like the above that automatically thumbnails pictures when you upload them via a form, or something. If that doesn't work, or you want something more advanced, I can send you a code sample when my website works again!

- Edited By Leperous On Mon 21st, Apr 2003 @ 11:14:07am

Wuggawoo.co.uk

it wooorks, except you really should ImageCreateTrueColor

Tada!

Wuggawoo.co.uk

nifteh