How to stop periods from ruining links?

[Nathan Malcolm]

Edit ./inc/class_parser.php and replace:

	/**
	* Parses URLs automatically.
	*
	* @param string The message to be parsed
	* @return string The parsed message.
	*/
	function mycode_auto_url($message)
	{	
		$message = " ".$message;
		$message = preg_replace("#([\>\s\(\)])(http|https|ftp|news){1}://([^\/\"\s\<\[\.]+\.([^\/\"\s\<\[\.]+\.)*[\w]+(:[0-9]+)?(/[^\"\s<\[]*)?)#i", "$1[url]$2://$3[/url]", $message);
		$message = preg_replace("#([\>\s\(\)])(www|ftp)\.(([^\/\"\s\<\[\.]+\.)*[\w]+(:[0-9]+)?(/[^\"\s<\[]*)?)#i", "$1[url]$2.$3[/url]", $message);
		$message = my_substr($message, 1);
		
		return $message;
	}

with:

	/**
	* Parses URLs automatically.
	*
	* @param string The message to be parsed
	* @return string The parsed message.
	*/
	function mycode_auto_url($message)
	{
		$message = " ".$message;
		// Links should end with slashes, numbers, characters and braces but not with dots, commas or question marks
		$message = preg_replace_callback("#([\>\s\(\)])(http|https|ftp|news){1}://([^\/\"\s\<\[\.]+\.([^\/\"\s\<\[\.]+\.)*[\w]+(:[0-9]+)?(/[^\"\s<]*)?([\w\/\)]))#iu", array($this, 'mycode_auto_url_callback'), $message);
		$message = preg_replace_callback("#([\>\s\(\)])(www|ftp)\.(([^\/\"\s\<\[\.]+\.)*[\w]+(:[0-9]+)?(/[^\"\s<]*)?([\w\/\)]))#iu", array($this, 'mycode_auto_url_callback'), $message);
		$message = my_substr($message, 1);
		
		return $message;
	}

	/**
	* Parses URLs automatically.
	*
	* @param array Matches
	* @return string The parsed message.
	*/
	function mycode_auto_url_callback($matches)
	{
		$external = '';
		// Allow links like http://en.wikipedia.org/wiki/PHP_(disambiguation) but detect mismatching braces
		while(my_substr($matches[3], -1) == ')')
		{
			if(substr_count($matches[3], ')') > substr_count($matches[3], '('))
			{
				$matches[3] = my_substr($matches[3], 0, -1);
				$external = ')'.$external;
			}
			else
			{
				break;
			}

			// Example: ([...] http://en.wikipedia.org/Example_(disambiguation).)
			$last_char = my_substr($matches[3], -1);
			while($last_char == '.' || $last_char == ',' || $last_char == '?')
			{
				$matches[3] = my_substr($matches[3], 0, -1);
				$external = $last_char.$external;
				$last_char = my_substr($matches[3], -1);
			}
		}
		if($matches[2] == 'www' || $matches[2] == 'ftp')
		{
			return "{$matches[1]}[url]{$matches[2]}.{$matches[3]}[/url]{$external}";
		}
		else
		{
			return "{$matches[1]}[url]{$matches[2]}://{$matches[3]}[/url]{$external}";
		}
	}

For future reference, you can apply patches using the 'patch' utility on Linux.

cd /path/to/mybb
wget https://github.com/mybb/mybb/pull/110.patch
patch -p1 110.patch