GD resample question

[ts10]

User is uploading an image of any reasonable size.

GD resamples it to a max 600 width and a max 250 height, however, the new image is 50k - which is too big.

It was originally 300DPI, but I don't know if that resample affects that or not. I don't want to lose a "decent" quality of the image, but I want to make sure it's not more than 72 DPI and no more than about 10, regardless the original size.

How can I do this?

Here's the code I'm using:

    $image_rsz = imagecreatetruecolor($target_wd, $target_ht);
    $image = imagecreatefromjpeg($UploadName);
    imagecopyresampled($image_rsz, $image, 0, 0, 0, 0, $target_wd, $target_ht,
                                                       $orig_wd,   $orig_ht);
    imagejpeg($image_rsz, $UploadName);

Thanks!

[Weedpacket]

DPI isn't relevant. That only relates the size of a pixel to real-world units (hence, "dots per inch"); the number of pixels doesn't change and nor does the information required to encode them.

Experiment with imagejpeg's quality parameter, but you'll have to make a tradeoff sooner or later.