php resize image on upload

Question

I got a form where the user is inserting some data and also uploading an image.

To deal with the image, I got the following code:

define(\"MAX_SIZE\"         


        

Answer 1

" method="post" enctype="multipart/form-data" id="something" class="uniForm">
    
    Upload Image



";                     
          imagejpeg($tn, $save, 100) ;

          //thumbnail image making part
          $save = "images/thumb/" . $imagepath; //This is the new file you saving
          $file = "images/" . $imagepath; //This is the original file   
          list($width, $height) = getimagesize($file) ;
          $modwidth = 150;
          $diff = $width / $modwidth;
          $modheight = $height / $diff;
          $tn = imagecreatetruecolor($modwidth, $modheight) ;
          $image = imagecreatefromjpeg($file) ;
          imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ;
        //echo "Thumbnail: ";
          imagejpeg($tn, $save, 100) ;
          }
        else{
            echo "File is not image";
            }
      }
    }
?>