SimpleMachines / SMF2.1

		if (!empty($src))

		{

			// Attempt to fix the path in case it's not present.

			if (preg_match('~^https?://~i', $src) === 0 && is_array($parsedURL = parse_url($scripturl)) && isset($parsedURL['host']))

			{

				$baseURL = (isset($parsedURL['scheme']) ? $parsedURL['scheme'] : 'http') . '://' . $parsedURL['host'] . (empty($parsedURL['port']) ? '' : ':' . $parsedURL['port']);

				if (substr($src, 0, 1) === '/')

					$src = $baseURL . $src;

				else

					$src = $baseURL . (empty($parsedURL['path']) ? '/' : preg_replace('~/(?:index\\.php)?$~', '', $parsedURL['path'])) . '/' . $src;

			}

			$tag = '[img' . $params . ']' . $src . '[/img]';

		}

				}

				// No http(s), so attempt to fix this potential relative URL.

				elseif (preg_match('~^https?://~i', $href) === 0 && is_array($parsedURL = parse_url($scripturl)) && isset($parsedURL['host']))

				{

					$baseURL = (isset($parsedURL['scheme']) ? $parsedURL['scheme'] : 'http') . '://' . $parsedURL['host'] . (empty($parsedURL['port']) ? '' : ':' . $parsedURL['port']);

					if (substr($href, 0, 1) === '/')

						$href = $baseURL . $href;

					else

						$href = $baseURL . (empty($parsedURL['path']) ? '/' : preg_replace('~/(?:index\\.php)?$~', '', $parsedURL['path'])) . '/' . $href;

				}

			}

			// External URL?