Not for 'how-to' coding questions but PHP theory instead, this forum is here for those of us who wish to learn about design aspects of programming with PHP.
i want to create a thumbnail for the image, and i want the size in bytes must be more smaller.
for the fast loading of the page if the images are loaded.
thanks...
GD can perform that on the more common image types. It's often suggested to cache the thumbnails instead of always doing them on-the-fly due to the massive performance difference.