full size images to thumb nails

lives4him06

i have a gallary of shrunken images that are links that point to the full sized image. (i dont know whether or not to call this a thumbnail because the image is only smaller due to html code as seen below). The paths for the images are saved in a database and 6 images are shown at a time using PHP.

$pic = the path of the image.

PHP:

echo "<a href=/images/$pic><img src=$pic width=100 height=150></a>";

The problem is, is that these images are rather large and consequently the page takes a long time to load due to the page trying to load 6 images that take up considerable disk space.

is there anything i can do to shrink image size of the tumbnails through php or will i have to manually make thumbnails?

I know i posted this over a month ago, but i had minimal success, and the problem has become more urgent

poison

try something like

header("Content-Type: image/png");
$image=imagecreatefrompng ('file.png');
imagecopyresized ($image_resized, $image, 0, 0, 0, 0, 100, 150, imagesx($image), $imagesy($image));
imagepng ($image_resized);
imagedestroy ($image);
imagedestroy ($image_resized);

regards

lives4him06

thanks, but i have a few more questions, this will work with jpeg's right? simply bychanging image/png to image/jpeg.

also im confused on the variables, could you please show me a working model using welcome.png?

thanks

poison

thanks, but i have a few more questions, this will work with jpeg's right?

no...for jpeg's you have to pass a different header to the client:
header("Content-Type: image/png");
open the file with
imagecreatefromjpeg ('file.png');
and output a jpeg image:
imagejpeg ($image_resized);

showthumb.php

header("Content-Type: image/png");
$image=imagecreatefrompng ($_GET['image']);
imagecopyresized ($image_resized, $image, 0, 0, 0, 0, 100, 150, imagesx($image), $imagesy($image));
imagepng ($image_resized);
imagedestroy ($image);
imagedestroy ($image_resized);

if you now open
'/showthumb.php?image=welcome.php'
in your browser you will see a thumbnail generated...
you can treat that PHP script as a normal image in your HTML code:
echo '<a href="/images/' . $pic . '"><img src="/showthumb?image=' . urlencode($pic) . '" width="100" height="150"></a>';
WARNING: this is ment as a demonstration and does /NOT/ make any security related checks...only use it for testing...

for a reference on the functions see -> http://de3.php.net/manual/en/ref.image.php

tekky

Originally posted by poison
no...for jpeg's you have to pass a different header to the client:
header("Content-Type: image/png");
open the file with
imagecreatefromjpeg ('file.png');
and output a jpeg image:
imagejpeg ($image_resized);
..........

😕

Wow... you really mixed this one up.... heh

live4him06, you are partially right... change the header to image/jpeg but also have to change the createfrom function and the imagetype fucntion like above here... just be sure that the file is a .JPG not a .PNG 😉

lives4him06

can somebody show me a working model using the example hello.jpg? (purpose being the complete understanding of all the variables and being able to duplicate this.

Thanks!!