To generate thumbnail, here is the simple and easiest way. It will help you in creating thumb for jpg, png and gif images. /* generateThumb() * * @param mixed $source Path to source file * @param mixed $destination Path to destination file * @param mixed $width Thumbnail file width * @param mixed $height Thumbnail file height * @return bool */ function generateThumb($source, $destination, $width = 100, $height = 100){ $ext = strtolower(substr($source, strrpos($source, ".")+1)); $format = ($ext == 'jpg')?'jpeg':$ext; $from_format = "imagecreatefrom".$format; $source_image = $from_format ( $source ); $source_width = imagesx ( $source_image ); $source_height = imagesy ( $source_image ); $ratio1 = $source_width/ $width; $ratio2 = $source_height / $height; if($ratio1 > $ratio2){ $width = $width; $height = $source_height/$ratio1; }else{ $width = $source_width/$ratio2; $height = $height; } $target_image = imagecr...