Someone

		function resizeImage($filename, $writeto, $max_width, $max_height)
		{
			if ($this->method == 'gd' OR !isset($this->method))
			{
				list($orig_width, $orig_height) = getimagesize($filename);
				$width = $orig_width;
				$height = $orig_height;
				if ($height > $max_height)
				{
					$width = ($max_height / $height) * $width;
					$height = $max_height;
				}
				if ($width > $max_width)
				{
					$height = ($max_width / $width) * $height;
					$width = $max_width;
				}
				$image_p = imagecreatetruecolor($width, $height);
				$image = imagecreatefromjpeg($filename);
				imagecopyresampled($image_p, $image, 0, 0, 0, 0,
				$width, $height, $orig_width, $orig_height);
				$image_p = imagejpeg($image_p, $writeto, 100);
			}
			elseif ($this->method == 'imagemagick')
			{
				list($orig_width, $orig_height) = getimagesize($filename);
				$width = $orig_width;
				$height = $orig_height;
				if ($height > $max_height)
				{
					$width = ($max_height / $height) * $width;
					$height = $max_height;
				}
				if ($width > $max_width)
				{
					$height = ($max_width / $width) * $height;
					$width = $max_width;
				}
				shell_exec($this->imagemagickpath . ' ' . $filename . " -geometry " . $width . "x" . $height." -quality 90 " . $writeto);
			}
		}