checking for img sizes and if exceds limit resize

[TimTimTimma]

The members on my website are allowed an avatar that will appear by their name whnever a post is made by them, now lets say I want the max size for the avatar to be is 75x75, i could simply just set every avatar size to that, but what if the avatar is smaller in both hieght and width? I need to develop a script which will check for the images size, thn resize it appropriately if it exceds the limits. Any ideas on how to do this?

[leatherback]

Hi,

To give you a start..

   $size = GetImageSize($tmp_picture);
    $aspectRat = (float)($size[1] / $size[0]);

    // ***************** Calculate new x/y size, maintaining original aspect ratio

    if( ($size[0] <= $new_max_width) && ($size[1] <= $new_max_width) )  // Image < max size
    {
    $result = move_uploaded_file($tmp_picture, $new_picture);
    }
    else 
    {

    $width_ratio = $size[0] / $new_max_width;
    $height_ratio = $size[1] / $new_max_height;

    if($width_ratio >= $height_ratio)  // width needs to be reduced more
      {
      $newY = $new_max_width * $aspectRat;
      $newX = $new_max_width;
      }
    else
      {
      $newY = $new_max_height;
      $newX = $new_max_height * (1/$aspectRat);
      }

With the GD library you can then create new images