-<?php

-/***************************************************************************

- * bbcode.php

- * -------------------

- * begin : Saturday, Feb 13, 2001

- * copyright : (C) 2001 The phpBB Group

- * email : support@phpbb.com

- *

- * $Id$

- *

- ***************************************************************************/

-

- /***************************************************************************

- *

- * This program is free software; you can redistribute it and/or modify

- * it under the terms of the GNU General Public License as published by

- * the Free Software Foundation; either version 2 of the License, or

- * (at your option) any later version.

- *

- *

- *

- ***************************************************************************/

-

-

-define("BBCODE_UID_LEN", 10);

-

-

-/**

- * Does second-pass bbencoding. This should be used before displaying the message in

- * a thread. Assumes the message is already first-pass encoded, and has the required

- * "[uid:...]" tag as the very first thing in the text.

- */

-function bbencode_second_pass($text, $uid)

-{

-

- //$uid_tag_length = strpos($text, ']') + 1;

- //$uid = substr($text, 5, BBCODE_UID_LEN);

- //$text = substr($text, $uid_tag_length);

-

- // pad it with a space so we can distinguish between FALSE and matching the 1st char (index 0).

- // This is important; bbencode_quote(), bbencode_list(), and bbencode_code() all depend on it.

- $text = " " . $text;

-

- // First: If there isn't a "[" and a "]" in the message, don't bother.

- if (! (strpos($text, "[") && strpos($text, "]")) )

- {

- // Remove padding, return.

- $text = substr($text, 1);

- return $text;

- }

-

- // [CODE] and [/CODE] for posting code (HTML, PHP, C etc etc) in your posts.

- $text = bbencode_second_pass_code($text, $uid);

-

- // [list] and [list=x] for (un)ordered lists.

- // unordered lists

- $text = str_replace("[list:$uid]", '<UL>', $text);

- // li tags

- $text = str_replace("[*:$uid]", '<LI>', $text);

- // ending tags

- $text = str_replace("[/list:u:$uid]", '</UL>', $text);

- $text = str_replace("[/list:o:$uid]", '</OL>', $text);

- // Ordered lists

- $text = preg_replace("/\[list=([a1]):$uid\]/si", '<OL TYPE="\1">', $text);

-

- // [QUOTE] and [/QUOTE] for posting replies with quote, or just for quoting stuff.

- $text = str_replace("[quote:$uid]", '<TABLE BORDER="0" ALIGN="CENTER" WIDTH="85%"><TR><TD><font size="-1">Quote:</font><HR></TD></TR><TR><TD><FONT SIZE="-1"><BLOCKQUOTE>', $text);

- $text = str_replace("[/quote:$uid]", '</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>', $text);

-

- // [b] and [/b] for bolding text.

- $text = str_replace("[b:$uid]", '<B>', $text);

- $text = str_replace("[/b:$uid]", '</B>', $text);

-

- // [i] and [/i] for italicizing text.

- $text = str_replace("[i:$uid]", '<I>', $text);

- $text = str_replace("[/i:$uid]", '</I>', $text);

-

- // [img]image_url_here[/img] code..

- $text = str_replace("[img:$uid]", '<IMG SRC="', $text);

- $text = str_replace("[/img:$uid]", '" BORDER="0"></IMG>', $text);

-

- // Patterns and replacements for URL and email tags..

- $patterns = array();

- $replacements = array();

-

- // [url]xxxx://www.phpbb.com[/url] code..

- $patterns[0] = "#\[url\]([a-z]+?://){1}(.*?)\[/url\]#si";

- $replacements[0] = '<A HREF="\1\2" TARGET="_blank">\1\2</A>';

-

- // [url]www.phpbb.com[/url] code.. (no xxxx:// prefix).

- $patterns[1] = "#\[url\](.*?)\[/url\]#si";

- $replacements[1] = '<A HREF="http://\1" TARGET="_blank">\1</A>';

-

- // [url=xxxx://www.phpbb.com]phpBB[/url] code..

- $patterns[2] = "#\[url=([a-z]+?://){1}(.*?)\](.*?)\[/url\]#si";

- $replacements[2] = '<A HREF="\1\2" TARGET="_blank">\3</A>';

-

- // [url=www.phpbb.com]phpBB[/url] code.. (no xxxx:// prefix).

- $patterns[3] = "#\[url=(.*?)\](.*?)\[/url\]#si";

- $replacements[3] = '<A HREF="http://\1" TARGET="_blank">\2</A>';

-

- // [email]user@domain.tld[/email] code..

- $patterns[4] = "#\[email\](.*?)\[/email\]#si";

- $replacements[4] = '<A HREF="mailto:\1">\1</A>';

-

- $text = preg_replace($patterns, $replacements, $text);

-

- // Remove our padding from the string..

- $text = substr($text, 1);

-

- return $text;

-

-} // bbencode_second_pass()

-

-

-

-function make_bbcode_uid()

-{

- // Unique ID for this message..

- $uid = md5(uniqid(rand()));

- $uid = substr($uid, 0, BBCODE_UID_LEN);

-

- return $uid;

-}

-

-

-

-function bbencode_first_pass($text, $uid)

-{

- // pad it with a space so we can distinguish between FALSE and matching the 1st char (index 0).

- // This is important; bbencode_quote(), bbencode_list(), and bbencode_code() all depend on it.

- $text = " " . $text;

-

- // [CODE] and [/CODE] for posting code (HTML, PHP, C etc etc) in your posts.

- $text = bbencode_first_pass_pda($text, $uid, '[code]', '[/code]', '', true, '');

-

- // [QUOTE] and [/QUOTE] for posting replies with quote, or just for quoting stuff.

- $text = bbencode_first_pass_pda($text, $uid, '[quote]', '[/quote]', '', false, '');

-

- // [list] and [list=x] for (un)ordered lists.

- $open_tag = array();

- $open_tag[0] = "[list]";

-

- // unordered..

- $text = bbencode_first_pass_pda($text, $uid, $open_tag, "[/list]", "[/list:u]", false, 'replace_listitems');

-

- $open_tag[0] = "[list=1]";

- $open_tag[1] = "[list=a]";

-

- // ordered.

- $text = bbencode_first_pass_pda($text, $uid, $open_tag, "[/list]", "[/list:o]", false, 'replace_listitems');

-

- // [b] and [/b] for bolding text.

- $text = preg_replace("#\[b\](.*?)\[/b\]#si", "[b:$uid]\\1[/b:$uid]", $text);

-

- // [i] and [/i] for italicizing text.

- $text = preg_replace("#\[i\](.*?)\[/i\]#si", "[i:$uid]\\1[/i:$uid]", $text);

-

- // [img]image_url_here[/img] code..

- $text = preg_replace("#\[img\](.*?)\[/img\]#si", "[img:$uid]\\1[/img:$uid]", $text);

-

- // Remove our padding from the string..

- $text = substr($text, 1);

-

- // Add the uid tag to the start of the string..

- //$text = '[uid=' . $uid . ']' . $text;

-

- return $text;

-

-} // bbencode_first_pass()

-

-

-/**

- * $text - The text to operate on.

- * $uid - The UID to add to matching tags.

- * $open_tag - The opening tag to match. Can be an array of opening tags.

- * $close_tag - The closing tag to match.

- * $close_tag_new - The closing tag to replace with.

- * $mark_lowest_level - boolean - should we specially mark the tags that occur

- * at the lowest level of nesting? (useful for [code], because

- * we need to match these tags first and transform HTML tags

- * in their contents..

- * $func - This variable should contain a string that is the name of a function.

- * That function will be called when a match is found, and passed 2

- * parameters: ($text, $uid). The function should return a string.

- * This is used when some transformation needs to be applied to the

- * text INSIDE a pair of matching tags. If this variable is FALSE or the

- * empty string, it will not be executed.

- * If open_tag is an array, then the pda will try to match pairs consisting of

- * any element of open_tag followed by close_tag. This allows us to match things

- * like [list=A]...[/list] and [list=1]...[/list] in one pass of the PDA.

- *

- * NOTES: - this function assumes the first character of $text is a space.

- * - every opening tag and closing tag must be of the [...] format.

- */

-function bbencode_first_pass_pda($text, $uid, $open_tag, $close_tag, $close_tag_new, $mark_lowest_level, $func)

-{

- $open_tag_count = 0;

- $open_tag_length = array();

-

- if (!$close_tag_new || ($close_tag_new == ''))

- {

- $close_tag_new = $close_tag;

- }

-

- $close_tag_length = strlen($close_tag);

- $close_tag_new_length = strlen($close_tag_new);

- $uid_length = strlen($uid);

-

- $use_function_pointer = ($func && ($func != ''));

-

- $stack = array();

-

- if (is_array($open_tag))

- {

- if (0 == count($open_tag))

- {

- // No opening tags to match, so return.

- return $text;

- }

-

- for ($i = 0; $i < count($open_tag); $i++)

- {

- ++$open_tag_count;

- $open_tag_length[$i] = strlen($open_tag[$i]);

- }

- }

- else

- {

- // only one opening tag. make it into a 1-element array.

- $open_tag_temp = $open_tag;

- $open_tag = array();

- $open_tag[0] = $open_tag_temp;

- $open_tag_length[0] = strlen($open_tag[0]);

- $open_tag_count = 1;

- }

-

-

- // Start at the 2nd char of the string, looking for opening tags.

- $curr_pos = 1;

- while ($curr_pos && ($curr_pos < strlen($text)))

- {

- $curr_pos = strpos($text, "[", $curr_pos);

-

- // If not found, $curr_pos will be 0, and the loop will end.

- if ($curr_pos)

- {

- // We found a [. It starts at $curr_pos.

- // check if it's a starting or ending tag.

- $found_start = false;

- $which_start_tag = -1;

- for ($i = 0; $i < $open_tag_count; $i++)

- {

- $possible_start = substr($text, $curr_pos, $open_tag_length[$i]);

- if (0 == strcasecmp($open_tag[$i], $possible_start))

- {

- $found_start = true;

- $which_start_tag = $i;

- break;

- }

- }

-

- if ($found_start)

- {

- // We have an opening tag.

- // Push its position and length on to the stack, and then keep going to the right.

- $match = array("pos" => $curr_pos, "tag" => $which_start_tag);

- bbcode_array_push($stack, $match);

- ++$curr_pos;

- }

- else

- {

- // check for a closing tag..

- $possible_end = substr($text, $curr_pos, $close_tag_length);

- if (0 == strcasecmp($close_tag, $possible_end))

- {

- // We have an ending tag.

- // Check if we've already found a matching starting tag.

- if (sizeof($stack) > 0)

- {

- // There exists a starting tag.

- $curr_nesting_depth = sizeof($stack);

- // We need to do 2 replacements now.

- $match = bbcode_array_pop($stack);

- $start_index = $match['pos'];

- $which_start_tag = $match['tag'];

- $start_length = $open_tag_length[$which_start_tag];

- $start_tag = $open_tag[$which_start_tag];

-

- // everything before the opening tag.

- $before_start_tag = substr($text, 0, $start_index);

-

- // everything after the opening tag, but before the closing tag.

- $between_tags = substr($text, $start_index + $start_length, $curr_pos - $start_index - $start_length);

-

- // Run the given function on the text between the tags..

- if ($use_function_pointer)

- {

- $between_tags = $func($between_tags, $uid);

- }

-

- // everything after the closing tag.

- $after_end_tag = substr($text, $curr_pos + $close_tag_length);

-

- // Mark the lowest nesting level if needed.

- if ($mark_lowest_level && ($curr_nesting_depth == 1))

- {

- $text = $before_start_tag . substr($start_tag, 0, $start_length - 1) . ":$curr_nesting_depth:$uid]";

- $text .= $between_tags . substr($close_tag_new, 0, $close_tag_new_length - 1) . ":$curr_nesting_depth:$uid]";

- }

- else

- {

- $text = $before_start_tag . substr($start_tag, 0, $start_length - 1) . ":$uid]";

- $text .= $between_tags . substr($close_tag_new, 0, $close_tag_new_length - 1) . ":$uid]";

- }

-

- $text .= $after_end_tag;

-

- // Now.. we've screwed up the indices by changing the length of the string.

- // So, if there's anything in the stack, we want to resume searching just after it.

- // otherwise, we go back to the start.

- if (sizeof($stack) > 0)

- {

- $match = bbcode_array_pop($stack);

- $curr_pos = $match['pos'];

- bbcode_array_push($stack, $match);

- ++$curr_pos;

- }

- else

- {

- $curr_pos = 1;

- }

- }

- else

- {

- // No matching start tag found. Increment pos, keep going.

- ++$curr_pos;

- }

- }

- else

- {

- // No starting tag or ending tag.. Increment pos, keep looping.,

- ++$curr_pos;

- }

- }

- }

- } // while

-

- return $text;

-

-} // bbencode_first_pass_pda()

-

-

-

-

-/**

- * Does second-pass bbencoding of the [code] tags. This includes

- * running htmlspecialchars() over the text contained between

- * any pair of [code] tags that are at the first level of

- * nesting. Tags at the first level of nesting are indicated

- * by this format: [code:1:$uid] ... [/code:1:$uid]

- * Other tags are in this format: [code:$uid] ... [/code:$uid]

- */

-function bbencode_second_pass_code($text, $uid)

-{

-

- $code_start_html = '<TABLE BORDER="0" ALIGN="CENTER" WIDTH="85%"><TR><TD><font size="-1">Code:</font><HR></TD></TR><TR><TD><FONT SIZE="-1"><PRE>';

- $code_end_html = '</PRE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>';

-

- // First, do all the 1st-level matches. These need an htmlspecialchars() run,

- // so they have to be handled differently.

- $match_count = preg_match_all("#\[code:1:$uid\](.*?)\[/code:1:$uid\]#si", $text, $matches);

-

- for ($i = 0; $i < $match_count; $i++)

- {

- $before_replace = $matches[1][$i];

- $after_replace = $matches[1][$i];

-

- $after_replace = htmlspecialchars($after_replace);

-

- $str_to_match = "[code:1:$uid]" . $before_replace . "[/code:1:$uid]";

-

- $replacement = $code_start_html;

- $replacement .= $after_replace;

- $replacement .= $code_end_html;

-

- $text = str_replace($str_to_match, $replacement, $text);

- }

-

- // Now, do all the non-first-level matches. These are simple.

- $text = str_replace("[code:$uid]", $code_start_html, $text);

- $text = str_replace("[/code:$uid]", $code_end_html, $text);

-

- return $text;

-

-} // bbencode_second_pass_code()

-

-

-/**

- * Rewritten by Nathan Codding - Feb 6, 2001.

- * - Goes through the given string, and replaces xxxx://yyyy with an HTML <a> tag linking

- * to that URL

- * - Goes through the given string, and replaces www.xxxx.yyyy[zzzz] with an HTML <a> tag linking

- * to http://www.xxxx.yyyy[/zzzz]

- * - Goes through the given string, and replaces xxxx@yyyy with an HTML mailto: tag linking

- * to that email address

- * - Only matches these 2 patterns either after a space, or at the beginning of a line

- *

- * Notes: the email one might get annoying - it's easy to make it more restrictive, though.. maybe

- * have it require something like xxxx@yyyy.zzzz or such. We'll see.

- */

-

-function make_clickable($text)

-{

-

- // pad it with a space so we can match things at the start of the 1st line.

- $ret = " " . $text;

-

- // matches an "xxxx://yyyy" URL at the start of a line, or after a space.

- // xxxx can only be alpha characters.

- // yyyy is anything up to the first space, newline, or comma.

- $ret = preg_replace("#([\n ])([a-z]+?)://([^, \n\r]+)#i", "\\1<a href=\"\\2://\\3\" target=\"_blank\">\\2://\\3</a>", $ret);

-

- // matches a "www.xxxx.yyyy[/zzzz]" kinda lazy URL thing

- // Must contain at least 2 dots. xxxx contains either alphanum, or "-"

- // yyyy contains either alphanum, "-", or "."

- // zzzz is optional.. will contain everything up to the first space, newline, or comma.

- // This is slightly restrictive - it's not going to match stuff like "forums.foo.com"

- // This is to keep it from getting annoying and matching stuff that's not meant to be a link.

- $ret = preg_replace("#([\n ])www\.([a-z0-9\-]+)\.([a-z0-9\-.\~]+)((?:/[^, \n\r]*)?)#i", "\\1<a href=\"http://www.\\2.\\3\\4\" target=\"_blank\">www.\\2.\\3\\4</a>", $ret);

-

- // matches an email@domain type address at the start of a line, or after a space.

- // Note: before the @ sign, the only valid characters are the alphanums and "-", "_", or ".".

- // After the @ sign, we accept anything up to the first space, linebreak, or comma.

- $ret = preg_replace("#([\n ])([a-z0-9\-_.]+?)@([^, \n\r]+)#i", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $ret);

-

- // Remove our padding..

- $ret = substr($ret, 1);

-

- return($ret);

-}

-

-

-

-/**

- * This is used to change a [*] tag into a [*:$uid] tag as part

- * of the first-pass bbencoding of [list] tags. It fits the

- * standard required in order to be passed as a variable

- * function into bbencode_first_pass_pda().

- */

-function replace_listitems($text, $uid)

-{

- $text = str_replace("[*]", "[*:$uid]", $text);

-

- return $text;

-}

-

-

-/**

- * Escapes the "/" character with "\/". This is useful when you need

- * to stick a runtime string into a PREG regexp that is being delimited

- * with slashes.

- */

-function escape_slashes($input)

-{

- $output = str_replace('/', '\/', $input);

- return $output;

-}

-

-

-/**

- * This function does exactly what the PHP4 function array_push() does

- * however, to keep phpBB compatable with PHP 3 we had to come up with our own

- * method of doing it.

- */

-function bbcode_array_push(&$stack, $value) {

- $stack[] = $value;

- return(sizeof($stack));

-}

-

-/**

- * This function does exactly what the PHP4 function array_pop() does

- * however, to keep phpBB compatable with PHP 3 we had to come up with our own

- * method of doing it.

- */

-function bbcode_array_pop(&$stack) {

- $arrSize = count($stack);

- $x = 1;

- while(list($key, $val) = each($stack))

- {

- if($x < count($stack))

- {

- $tmpArr[] = $val;

- }

- else

- {

- $return_val = $val;

- }

- $x++;

- }

- $stack = $tmpArr;

-

- return($return_val);

-}

-

-

-

-?>