SimpleMachines / SMF2.1

				if ($isBlockLevelTag)

				{

					// Are there inline elements still open?

					if (!empty($inlineElements))

					{

						// Close all the inline tags, a block tag is coming...

						$parts[$i] .= '[/' . implode('][/', array_reverse($inlineElements)) . ']';

						// Now open them again, we're inside the block tag now.

						$parts[$i + 5] = '[' . implode('][', array_keys($inlineElements)) . ']' . $parts[$i + 5];

					}

					$blockElements[] = $tag;

				}

					}

					// Inline elements are still left opened?

					if (!empty($inlineElements))

					{

						// Close them first..

						$parts[$i] .= '[/' . implode('][/', array_reverse($inlineElements)) . ']';

						// Then reopen them.

						$parts[$i + 5] = '[' . implode('][', array_keys($inlineElements)) . ']' . $parts[$i + 5];

					}

				}

				// Inline tag.

				else