Reducing image during upload

[jkeppens]

Hi,

For a site I'm working on people can upload their picture. I want to reduce the size of it after they have uploaded it. How do I do it.

An example :

I made an image of 400300 and the size on the site is 160120.

I upload the image...

----- Server takes over -----
reduce image size whilst in tmp folder

* copy reduced image to the correct dir

I see my image in 160*120.

It's okay for an image to be distorted if the aspect ratio isn't 4/3.

JEroen

[Weedpacket]

See [man]imagecopyresized[/man]

[jkeppens]

Just found it :

<?
	if (!$img) $img = "icebear.jpg";
	$src_img_file_name = $img;

$size = getimagesize($src_img_file_name);

$dest_img_width = 160;
$dest_img_height = 120;

$src_img_width = $size[0];
$src_img_height = $size[1];


$src_img = imagecreatefromjpeg($src_img_file_name);
$dest_img = @imagecreate ($dest_img_width, $dest_img_height) or die ("Cannot Initialize new GD image stream");

imagecopyresized ($dest_img, $src_img, 0, 0, 0, 0, $dest_img_width, $dest_img_height, $src_img_width, $src_img_height);

header("Content-type: image/jpeg");
imagejpeg($dest_img);

?>

[Weedpacket]

Neat; just occurred to me, though - if you're using GDLib 2, then imagecopyresampled might give better results (especially for JPEGs). Should've thought of that sooner, I s'pose, but GD2 isn't quite as widespread as GD1.6+ yet.

[jkeppens]

I think my hosting company doesn't use that version. I tried it the "resample" before the "resize" function and it gave an error.

Thanks for the tip anyway!