PHP’de Resim Boyutlandırma

 	<?php
function resizejpeg($dir, $newdir, $img, $max_w, $max_h, $th_w, $th_h)
{
   // set destination directory
   if (!$newdir) $newdir = $dir;

   // get original images width and height
   list($or_w, $or_h, $or_t) = getimagesize($dir.$img);
   // make sure image is a jpeg
   if ($or_t == 2) {
       // obtain the image's ratio
      $ratio = ($or_h / $or_w);
       // original image
       $or_image = imagecreatefromjpeg($dir.$img);
       // resize image?
       if ($or_w > $max_w || $or_h > $max_h) {
           // resize by height, then width (height dominant)
           if ($max_h < $max_w) {
               $rs_h = $max_h;
               $rs_w = $rs_h / $ratio;
           }
           // resize by width, then height (width dominant)
           else {
               $rs_w = $max_w;
               $rs_h = $ratio * $rs_w;
           }
           // copy old image to new image
           $rs_image = imagecreatetruecolor($rs_w, $rs_h);
           imagecopyresampled($rs_image, $or_image, 0, 0, 0, 0, $rs_w, $rs_h, $or_w, $or_h);
       }
       // image requires no resizing
       else {
           $rs_w = $or_w;
           $rs_h = $or_h;
           $rs_image = $or_image;
       }
       // generate resized image
       imagejpeg($rs_image, $newdir.$img, 100);
       $th_image = imagecreatetruecolor($th_w, $th_h);
       // cut out a rectangle from the resized image and store in thumbnail
       $new_w = (($rs_w / 2) - ($th_w / 2));
       $new_h = (($rs_h / 2) - ($th_h / 2));
       imagecopyresized($th_image, $rs_image, 0, 0, $new_w, $new_h, $rs_w, $rs_h, $rs_w, $rs_h);
       return true;
   }

   // Image type was not jpeg!
   else {
       return false;
   }
}
resizejpeg($dir, '', "$sirketresimleri/$fotograflar1_name", 400, 400,100,100);
?>