Something

<?php
class picture
{
       var $save_dir;                    //where file will be saved
       var $filename="spacer.gif";        //default file name initially
       var $error_message="";            //string to be output if neccesary
       var $width;                        //height of final image
       var $height;                      //width of final image

       function picture($save_directory, $file_array, $max_width, $max_height)
       {
               $this->save_dir = $save_directory;               
               $this->width =    $max_width;
               $this->height =  $max_height;

               //--change filename to time - make it unique
               $temp_filename = $file_array['name'];
               $ext = explode('.',$temp_filename);
               $ext = $ext[count($ext)-1];
               $temp_filename = time().".".$ext;

               //--check that it's a jpeg or gif
               if (preg_match('/^(gif|jpe?g)$/',$ext)) {
                       // resize in proportion
                       list($width_orig, $height_orig) = getimagesize($file_array['tmp_name']);
                       if ($this->width && ($width_orig < $height_orig)) {
                               $this->width = ($this->height / $height_orig) * $width_orig;
                       } else {
                               $this->height = ($this->width / $width_orig) * $height_orig;
                       }

                       $image_p = imagecreatetruecolor($this->width, $this->height);                       

                       //handle gifs and jpegs separately
                       if($ext=='gif'){
                           $image = imagecreatefromgif($file_array['tmp_name']);                           
                           imagecopyresampled($image_p, $image, 0, 0, 0, 0, $this->width, $this->height, $width_orig, $height_orig);
                           imagegif($image_p, $this->save_dir.$temp_filename, 80);
                       }
                       else
                       {
                           $image = imagecreatefromjpeg($file_array['tmp_name']);                           
                           imagecopyresampled($image_p, $image, 0, 0, 0, 0, $this->width, $this->height, $width_orig, $height_orig);                           
                           imagejpeg($image_p, $this->save_dir.$temp_filename, 80);
                       }

                       imagedestroy($image_p);
                       imagedestroy($image);

                       $this->filename=$temp_filename;

               }else{
                       $this->error_message.="<br> file is not a jpeg or gif picture <br>";
               }
       }
}
?>