SimpleMachines / SMF2.1

						{

							list ($width, $height) = url_image_size($imgtag);

							if (!empty($modSettings['max_image_width']) && $width > $modSettings['max_image_width'])

							{

								$height = (int) (($modSettings['max_image_width'] * $height) / $width);

								$width = $modSettings['max_image_width'];

							}

							if (!empty($modSettings['max_image_height']) && $height > $modSettings['max_image_height'])

							{

								$width = $modSettings['max_image_width'];

							}

							if (!empty($modSettings['max_image_height']) && $height > $modSettings['max_image_height'])

							{

								$width = (int) (($modSettings['max_image_height'] * $width) / $height);

								$height = $modSettings['max_image_height'];

							}

							// Set the new image tag.

							$replaces[$matches[0][$match]] = '[img width=' . $width . ' height=' . $height . $alt . ']' . $imgtag . '[/img]';

			}

			// Now check the height, as well.  Might have to scale twice, even...

			if ($desired_height > $modSettings['max_image_height'] && !empty($modSettings['max_image_height']))

			{

				$desired_width = (int) (($modSettings['max_image_height'] * $desired_width) / $desired_height);

				$desired_height = $modSettings['max_image_height'];

			}

			$replaces[$matches[0][$match]] = '[img' . (!empty($desired_width) ? ' width=' . $desired_width : '') . (!empty($desired_height) ? ' height=' . $desired_height : '') . ']' . $matches[4][$match] . '[/img]';

		}