Help me convert BBCode to HTML and back again

[KingOfHeart]

I have 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 size. 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.

 

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*)?\[list(?:)?(:\w+)?=1\]\s*(?:<br\s*\/?>)?/si' => "\n<ol class=\"bb-list-ordered,bb-list-ordered-d\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?:)?(:\w+)?=i\]\s*(?:<br\s*\/?>)?/s'  => "\n<ol class=\"bb-list-ordered,bb-list-ordered-lr\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?:)?(:\w+)?=I\]\s*(?:<br\s*\/?>)?/s'  => "\n<ol class=\"bb-list-ordered,bb-list-ordered-ur\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?:)?(:\w+)?=a\]\s*(?:<br\s*\/?>)?/s'  => "\n<ol class=\"bb-list-ordered,bb-list-ordered-la\">",
          '/(?<!\\\\)(?:\s*<br\s*\/?>\s*)?\[list(?:)?(:\w+)?=A\]\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;
}

 

If you don't want to do the actual work then can you help me try to figure out which command I need to look at to check to see if a value is too high or low?

Also wonder if I have to change the formula out of an array.

[KingOfHeart]

Any advice?

[premiso]

http://corz.org/blog/inc/cbparser.php

 

Why re-invent the wheel?

 

As far as the images, I am not sure how you would do that other than just looping through all the img tags first and checking it that way, if it is invalid width/height than let them know and have that commented out?