Help me convert BBCode to HTML and back again

Any questions involving matching text strings to patterns - the pattern is called a "regular expression."

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KingOfHeart
Forum Newbie
Posts: 3
Joined: Wed Dec 03, 2008 9:22 pm

Help me convert BBCode to HTML and back again

Post by KingOfHeart »

I found this code on the web (forgot the site) with a function to convert BBCode to HTML. Guess what, it worked but there are two small problems. First there is no limit for the width and height for an image. There are also no limits for how big they can make the font. So can anyone help me create these limits?
Then after that is done, I'll need to convert the HTML back into BBCode again for when they need to edit their page.
Below is the function.

Code: Select all

 
function bbcode2html($message) {
 
    
  $preg = array(
          '/(?<!\\\\)\[color(?::\w+)?=(.*?)\](.*?)\[\/color(?::\w+)?\]/si'   => "<span style=\"color:\\1\">\\2</span>",
          '/(?<!\\\\)\[size(?::\w+)?=(.*?)\](.*?)\[\/size(?::\w+)?\]/si'     => "<span style=\"font-size:\\1\">\\2</span>",
          '/(?<!\\\\)\[font(?::\w+)?=(.*?)\](.*?)\[\/font(?::\w+)?\]/si'     => "<span style=\"font-family:\\1\">\\2</span>",
          '/(?<!\\\\)\[align(?::\w+)?=(.*?)\](.*?)\[\/align(?::\w+)?\]/si'   => "<div style=\"text-align:\\1\">\\2</div>",
          '/(?<!\\\\)\[b(?::\w+)?\](.*?)\[\/b(?::\w+)?\]/si'                 => "<span style=\"font-weight:bold\">\\1</span>",
          '/(?<!\\\\)\[i(?::\w+)?\](.*?)\[\/i(?::\w+)?\]/si'                 => "<span style=\"font-style:italic\">\\1</span>",
          '/(?<!\\\\)\[u(?::\w+)?\](.*?)\[\/u(?::\w+)?\]/si'                 => "<span style=\"text-decoration:underline\">\\1</span>",
          '/(?<!\\\\)\[center(?::\w+)?\](.*?)\[\/center(?::\w+)?\]/si'       => "<div style=\"text-align:center\">\\1</div>",
 
          // [email]
          '/(?<!\\\\)\[email(?::\w+)?\](.*?)\[\/email(?::\w+)?\]/si'         => "<a href=\"mailto:\\1\" class=\"bb-email\">\\1</a>",
          '/(?<!\\\\)\[email(?::\w+)?=(.*?)\](.*?)\[\/email(?::\w+)?\]/si'   => "<a href=\"mailto:\\1\" class=\"bb-email\">\\2</a>",
          // [url]
          '/(?<!\\\\)\[url(?::\w+)?\]www\.(.*?)\[\/url(?::\w+)?\]/si'        => "<a href=\"http://www.\\1\" target=\"_blank\" class=\"bb-url\">\\1</a>",
          '/(?<!\\\\)\[url(?::\w+)?\](.*?)\[\/url(?::\w+)?\]/si'             => "<a href=\"\\1\" target=\"_blank\" class=\"bb-url\">\\1</a>",
          '/(?<!\\\\)\[url(?::\w+)?=(.*?)?\](.*?)\[\/url(?::\w+)?\]/si'      => "<a href=\"\\1\" target=\"_blank\" class=\"bb-url\">\\2</a>",
          // [img]
          '/(?<!\\\\)\[img(?::\w+)?\](.*?)\[\/img(?::\w+)?\]/si'             => "<img src=\"\\1\" alt=\"\\1\" class=\"bb-image\" />",
          '/(?<!\\\\)\[img(?::\w+)?=(.*?)x(.*?)\](.*?)\[\/img(?::\w+)?\]/si' => "<img width=\"\\1\" height=\"\\2\" src=\"\\3\" alt=\"\\3\" class=\"bb-image\" />",
          
          // [list]
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[\*(?::\w+)?\](.*?)(?=(?:\s*<br\s*\/?>\s*)?\[\*|(?:\s*<br\s*\/?>\s*)?\[\/?list)/si' => "\n<li class=\"bb-listitem\">\\1</li>",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[\/list(:(?!u|o)\w+)?\](?:<br\s*\/?>)?/si'    => "\n</ul>",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[\/list:u(:\w+)?\](?:<br\s*\/?>)?/si'         => "\n</ul>",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[\/list:o(:\w+)?\](?:<br\s*\/?>)?/si'         => "\n</ol>",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(:(?!u|o)\w+)?\]\s*(?:<br\s*\/?>)?/si'   => "\n<ul class=\"bb-list-unordered\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list:u(:\w+)?\]\s*(?:<br\s*\/?>)?/si'        => "\n<ul class=\"bb-list-unordered\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list:o(:\w+)?\]\s*(?:<br\s*\/?>)?/si'        => "\n<ol class=\"bb-list-ordered\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?::o)?(:\w+)?=1\]\s*(?:<br\s*\/?>)?/si' => "\n<ol class=\"bb-list-ordered,bb-list-ordered-d\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?::o)?(:\w+)?=i\]\s*(?:<br\s*\/?>)?/s'  => "\n<ol class=\"bb-list-ordered,bb-list-ordered-lr\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?::o)?(:\w+)?=I\]\s*(?:<br\s*\/?>)?/s'  => "\n<ol class=\"bb-list-ordered,bb-list-ordered-ur\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?::o)?(:\w+)?=a\]\s*(?:<br\s*\/?>)?/s'  => "\n<ol class=\"bb-list-ordered,bb-list-ordered-la\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?::o)?(:\w+)?=A\]\s*(?:<br\s*\/?>)?/s'  => "\n<ol class=\"bb-list-ordered,bb-list-ordered-ua\">",
          
          //line breaks
          '/\n/'                                                               => "<br>",
          // escaped tags like \[b], \[color], \[url], ...
          '/\\\\(\[\/?\w+(?::\w+)*\])/'                                      => "\\1"
 
  );
 
  $message = preg_replace(array_keys($preg), array_values($preg), $message);
  return $message;
}
 
KingOfHeart
Forum Newbie
Posts: 3
Joined: Wed Dec 03, 2008 9:22 pm

Re: Help me convert BBCode to HTML and back again

Post by KingOfHeart »

Can't anyone help me with this script? Is it really that hard to do?
User avatar
prometheuzz
Forum Regular
Posts: 779
Joined: Fri Apr 04, 2008 5:51 am

Re: Help me convert BBCode to HTML and back again

Post by prometheuzz »

KingOfHeart wrote:Can't anyone help me with this script? Is it really that hard to do?
Well, since you bumped your thread, I'll answer you as to why I didn't answer your question. I didn't because you're not here to learn something about regexes but to find someone to adjust something you didn't understand to begin with. Helping you would be telling you to start learning the basics of regex. I hereby do so.

Best of luck.
KingOfHeart
Forum Newbie
Posts: 3
Joined: Wed Dec 03, 2008 9:22 pm

Re: Help me convert BBCode to HTML and back again

Post by KingOfHeart »

Doubt I can learn it, but at this point I want to focus on that one little area for checking those numbers. Which command could be used to do that? Is it possible or do I need a rewrite?
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