SimpleMachines / SMF2.1

				$pos2 = $pos - 1;

				// See the comment at the end of the big loop - just eating whitespace ;).

				if (!empty($tag['block_level']) && substr($message, $pos, 4) == '<br>')

					$message = substr($message, 0, $pos) . substr($message, $pos + 4);

				if (!empty($tag['trim']) && $tag['trim'] != 'inside' && preg_match('~(<br>|&nbsp;|\s)*~', substr($message, $pos), $matches) != 0)

					$message = substr($message, 0, $pos) . substr($message, $pos + strlen($matches[0]));

			}

				$pos1 += $ot_strlen + 2;

				// Trim or eat trailing stuff... see comment at the end of the big loop.

				if (!empty($open_tags[$i]['block_level']) && substr($message, $pos, 4) == '<br>')

					$message = substr($message, 0, $pos) . substr($message, $pos + 4);

				if (!empty($open_tags[$i]['trim']) && $tag['trim'] != 'inside' && preg_match('~(<br>|&nbsp;|\s)*~', substr($message, $pos), $matches) != 0)

					$message = substr($message, 0, $pos) . substr($message, $pos + strlen($matches[0]));

		}

		// If this is block level, eat any breaks after it.

		if (!empty($tag['block_level']) && substr($message, $pos + 1, 4) == '<br>')

			$message = substr($message, 0, $pos + 1) . substr($message, $pos + 5);

		// Are we trimming outside this tag?

		if (!empty($tag['trim']) && $tag['trim'] != 'outside' && preg_match('~(<br>|&nbsp;|\s)*~', substr($message, $pos + 1), $matches) != 0)