mirror of
https://github.com/phpbb/phpbb.git
synced 2025-02-23 19:45:10 +01:00
bb1679af9a
All this is only been tested on Postgres, donno if it works as well on MySQL yet, will test when I can get access to sourceforge again git-svn-id: file:///svn/phpbb/trunk@328 89ea8834-ac86-4346-8a33-228a782c2dd0
541 lines
18 KiB
PHP
541 lines
18 KiB
PHP
<?php
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/***************************************************************************
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* bbcode.php
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* -------------------
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* begin : Saturday, Feb 13, 2001
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* copyright : (C) 2001 The phpBB Group
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* email : support@phpbb.com
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*
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* $Id$
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*
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*
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***************************************************************************/
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define("BBCODE_UID_LEN", 10);
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/**
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* Does second-pass bbencoding. This should be used before displaying the message in
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* a thread. Assumes the message is already first-pass encoded, and has the required
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* "[uid:...]" tag as the very first thing in the text.
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*/
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function bbencode_second_pass($text, $uid)
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{
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//$uid_tag_length = strpos($text, ']') + 1;
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//$uid = substr($text, 5, BBCODE_UID_LEN);
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//$text = substr($text, $uid_tag_length);
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// pad it with a space so we can distinguish between FALSE and matching the 1st char (index 0).
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// This is important; bbencode_quote(), bbencode_list(), and bbencode_code() all depend on it.
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$text = " " . $text;
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// First: If there isn't a "[" and a "]" in the message, don't bother.
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if (! (strpos($text, "[") && strpos($text, "]")) )
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{
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// Remove padding, return.
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$text = substr($text, 1);
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return $text;
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}
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// [CODE] and [/CODE] for posting code (HTML, PHP, C etc etc) in your posts.
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$text = bbencode_second_pass_code($text, $uid);
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// [list] and [list=x] for (un)ordered lists.
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// unordered lists
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$text = str_replace("[list:$uid]", '<UL>', $text);
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// li tags
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$text = str_replace("[*:$uid]", '<LI>', $text);
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// ending tags
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$text = str_replace("[/list:u:$uid]", '</UL>', $text);
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$text = str_replace("[/list:o:$uid]", '</OL>', $text);
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// Ordered lists
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$text = preg_replace("/\[list=([a1]):$uid\]/si", '<OL TYPE="\1">', $text);
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// [QUOTE] and [/QUOTE] for posting replies with quote, or just for quoting stuff.
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$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>', $text);
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$text = str_replace("[/quote:$uid]", '</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>', $text);
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// [b] and [/b] for bolding text.
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$text = str_replace("[b:$uid]", '<B>', $text);
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$text = str_replace("[/b:$uid]", '</B>', $text);
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// [i] and [/i] for italicizing text.
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$text = str_replace("[i:$uid]", '<I>', $text);
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$text = str_replace("[/i:$uid]", '</I>', $text);
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// [img]image_url_here[/img] code..
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$text = str_replace("[img:$uid]", '<IMG SRC="', $text);
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$text = str_replace("[/img:$uid]", '" BORDER="0"></IMG>', $text);
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// Patterns and replacements for URL and email tags..
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$patterns = array();
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$replacements = array();
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// [url]xxxx://www.phpbb.com[/url] code..
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$patterns[0] = "#\[url\]([a-z]+?://){1}(.*?)\[/url\]#si";
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$replacements[0] = '<A HREF="\1\2" TARGET="_blank">\1\2</A>';
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// [url]www.phpbb.com[/url] code.. (no xxxx:// prefix).
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$patterns[1] = "#\[url\](.*?)\[/url\]#si";
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$replacements[1] = '<A HREF="http://\1" TARGET="_blank">\1</A>';
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// [url=xxxx://www.phpbb.com]phpBB[/url] code..
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$patterns[2] = "#\[url=([a-z]+?://){1}(.*?)\](.*?)\[/url\]#si";
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$replacements[2] = '<A HREF="\1\2" TARGET="_blank">\3</A>';
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// [url=www.phpbb.com]phpBB[/url] code.. (no xxxx:// prefix).
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$patterns[3] = "#\[url=(.*?)\](.*?)\[/url\]#si";
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$replacements[3] = '<A HREF="http://\1" TARGET="_blank">\2</A>';
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// [email]user@domain.tld[/email] code..
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$patterns[4] = "#\[email\](.*?)\[/email\]#si";
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$replacements[4] = '<A HREF="mailto:\1">\1</A>';
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$text = preg_replace($patterns, $replacements, $text);
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// Remove our padding from the string..
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$text = substr($text, 1);
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return $text;
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} // bbencode_second_pass()
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function make_bbcode_uid()
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{
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// Unique ID for this message..
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$uid = md5(uniqid(rand()));
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$uid = substr($uid, 0, BBCODE_UID_LEN);
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return $uid;
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}
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function bbencode_first_pass($text, $uid)
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{
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// pad it with a space so we can distinguish between FALSE and matching the 1st char (index 0).
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// This is important; bbencode_quote(), bbencode_list(), and bbencode_code() all depend on it.
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$text = " " . $text;
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// [CODE] and [/CODE] for posting code (HTML, PHP, C etc etc) in your posts.
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$text = bbencode_first_pass_pda($text, $uid, '[code]', '[/code]', '', true, '');
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// [QUOTE] and [/QUOTE] for posting replies with quote, or just for quoting stuff.
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$text = bbencode_first_pass_pda($text, $uid, '[quote]', '[/quote]', '', false, '');
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// [list] and [list=x] for (un)ordered lists.
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$open_tag = array();
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$open_tag[0] = "[list]";
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// unordered..
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$text = bbencode_first_pass_pda($text, $uid, $open_tag, "[/list]", "[/list:u]", false, 'replace_listitems');
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$open_tag[0] = "[list=1]";
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$open_tag[1] = "[list=a]";
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// ordered.
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$text = bbencode_first_pass_pda($text, $uid, $open_tag, "[/list]", "[/list:o]", false, 'replace_listitems');
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// [b] and [/b] for bolding text.
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$text = preg_replace("#\[b\](.*?)\[/b\]#si", "[b:$uid]\\1[/b:$uid]", $text);
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// [i] and [/i] for italicizing text.
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$text = preg_replace("#\[i\](.*?)\[/i\]#si", "[i:$uid]\\1[/i:$uid]", $text);
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// [img]image_url_here[/img] code..
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$text = preg_replace("#\[img\](.*?)\[/img\]#si", "[img:$uid]\\1[/img:$uid]", $text);
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// Remove our padding from the string..
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$text = substr($text, 1);
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// Add the uid tag to the start of the string..
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//$text = '[uid=' . $uid . ']' . $text;
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return $text;
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} // bbencode_first_pass()
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/**
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* $text - The text to operate on.
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* $uid - The UID to add to matching tags.
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* $open_tag - The opening tag to match. Can be an array of opening tags.
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* $close_tag - The closing tag to match.
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* $close_tag_new - The closing tag to replace with.
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* $mark_lowest_level - boolean - should we specially mark the tags that occur
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* at the lowest level of nesting? (useful for [code], because
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* we need to match these tags first and transform HTML tags
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* in their contents..
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* $func - This variable should contain a string that is the name of a function.
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* That function will be called when a match is found, and passed 2
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* parameters: ($text, $uid). The function should return a string.
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* This is used when some transformation needs to be applied to the
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* text INSIDE a pair of matching tags. If this variable is FALSE or the
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* empty string, it will not be executed.
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* If open_tag is an array, then the pda will try to match pairs consisting of
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* any element of open_tag followed by close_tag. This allows us to match things
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* like [list=A]...[/list] and [list=1]...[/list] in one pass of the PDA.
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*
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* NOTES: - this function assumes the first character of $text is a space.
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* - every opening tag and closing tag must be of the [...] format.
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*/
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function bbencode_first_pass_pda($text, $uid, $open_tag, $close_tag, $close_tag_new, $mark_lowest_level, $func)
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{
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$open_tag_count = 0;
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$open_tag_length = array();
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if (!$close_tag_new || ($close_tag_new == ''))
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{
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$close_tag_new = $close_tag;
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}
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$close_tag_length = strlen($close_tag);
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$close_tag_new_length = strlen($close_tag_new);
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$uid_length = strlen($uid);
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$use_function_pointer = ($func && ($func != ''));
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$stack = array();
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if (is_array($open_tag))
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{
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if (0 == count($open_tag))
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{
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// No opening tags to match, so return.
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return $text;
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}
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for ($i = 0; $i < count($open_tag); $i++)
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{
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++$open_tag_count;
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$open_tag_length[$i] = strlen($open_tag[$i]);
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}
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}
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else
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{
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// only one opening tag. make it into a 1-element array.
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$open_tag_temp = $open_tag;
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$open_tag = array();
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$open_tag[0] = $open_tag_temp;
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$open_tag_length[0] = strlen($open_tag[0]);
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$open_tag_count = 1;
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}
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// Start at the 2nd char of the string, looking for opening tags.
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$curr_pos = 1;
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while ($curr_pos && ($curr_pos < strlen($text)))
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{
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$curr_pos = strpos($text, "[", $curr_pos);
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// If not found, $curr_pos will be 0, and the loop will end.
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if ($curr_pos)
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{
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// We found a [. It starts at $curr_pos.
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// check if it's a starting or ending tag.
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$found_start = false;
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$which_start_tag = -1;
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for ($i = 0; $i < $open_tag_count; $i++)
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{
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$possible_start = substr($text, $curr_pos, $open_tag_length[$i]);
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if (0 == strcasecmp($open_tag[$i], $possible_start))
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{
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$found_start = true;
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$which_start_tag = $i;
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break;
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}
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}
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if ($found_start)
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{
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// We have an opening tag.
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// Push its position and length on to the stack, and then keep going to the right.
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$match = array("pos" => $curr_pos, "tag" => $which_start_tag);
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bbcode_array_push($stack, $match);
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++$curr_pos;
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}
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else
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{
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// check for a closing tag..
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$possible_end = substr($text, $curr_pos, $close_tag_length);
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if (0 == strcasecmp($close_tag, $possible_end))
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{
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// We have an ending tag.
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// Check if we've already found a matching starting tag.
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if (sizeof($stack) > 0)
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{
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// There exists a starting tag.
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$curr_nesting_depth = sizeof($stack);
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// We need to do 2 replacements now.
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$match = bbcode_array_pop($stack);
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$start_index = $match['pos'];
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$which_start_tag = $match['tag'];
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$start_length = $open_tag_length[$which_start_tag];
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$start_tag = $open_tag[$which_start_tag];
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// everything before the opening tag.
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$before_start_tag = substr($text, 0, $start_index);
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// everything after the opening tag, but before the closing tag.
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$between_tags = substr($text, $start_index + $start_length, $curr_pos - $start_index - $start_length);
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// Run the given function on the text between the tags..
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if ($use_function_pointer)
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{
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$between_tags = $func($between_tags, $uid);
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}
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// everything after the closing tag.
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$after_end_tag = substr($text, $curr_pos + $close_tag_length);
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// Mark the lowest nesting level if needed.
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if ($mark_lowest_level && ($curr_nesting_depth == 1))
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{
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$text = $before_start_tag . substr($start_tag, 0, $start_length - 1) . ":$curr_nesting_depth:$uid]";
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$text .= $between_tags . substr($close_tag_new, 0, $close_tag_new_length - 1) . ":$curr_nesting_depth:$uid]";
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}
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else
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{
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$text = $before_start_tag . substr($start_tag, 0, $start_length - 1) . ":$uid]";
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$text .= $between_tags . substr($close_tag_new, 0, $close_tag_new_length - 1) . ":$uid]";
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}
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$text .= $after_end_tag;
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// Now.. we've screwed up the indices by changing the length of the string.
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// So, if there's anything in the stack, we want to resume searching just after it.
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// otherwise, we go back to the start.
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if (sizeof($stack) > 0)
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{
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$match = bbcode_array_pop($stack);
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$curr_pos = $match['pos'];
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bbcode_array_push($stack, $match);
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++$curr_pos;
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}
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else
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{
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$curr_pos = 1;
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}
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}
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else
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{
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// No matching start tag found. Increment pos, keep going.
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++$curr_pos;
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}
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}
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else
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{
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// No starting tag or ending tag.. Increment pos, keep looping.,
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++$curr_pos;
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}
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}
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}
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} // while
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return $text;
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} // bbencode_first_pass_pda()
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/**
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* Does second-pass bbencoding of the [code] tags. This includes
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* running htmlspecialchars() over the text contained between
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* any pair of [code] tags that are at the first level of
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* nesting. Tags at the first level of nesting are indicated
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* by this format: [code:1:$uid] ... [/code:1:$uid]
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* Other tags are in this format: [code:$uid] ... [/code:$uid]
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*/
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function bbencode_second_pass_code($text, $uid)
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{
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$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>';
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$code_end_html = '</PRE></FONT></TD></TR><TR><TD><HR></TD></TR></TABLE>';
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// First, do all the 1st-level matches. These need an htmlspecialchars() run,
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// so they have to be handled differently.
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$match_count = preg_match_all("#\[code:1:$uid\](.*?)\[/code:1:$uid\]#si", $text, $matches);
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for ($i = 0; $i < $match_count; $i++)
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{
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$before_replace = $matches[1][$i];
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$after_replace = $matches[1][$i];
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$after_replace = htmlspecialchars($after_replace);
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$str_to_match = "[code:1:$uid]" . $before_replace . "[/code:1:$uid]";
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$replacement = $code_start_html;
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$replacement .= $after_replace;
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$replacement .= $code_end_html;
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$text = str_replace($str_to_match, $replacement, $text);
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}
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// Now, do all the non-first-level matches. These are simple.
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$text = str_replace("[code:$uid]", $code_start_html, $text);
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$text = str_replace("[/code:$uid]", $code_end_html, $text);
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return $text;
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} // bbencode_second_pass_code()
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/**
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* Rewritten by Nathan Codding - Feb 6, 2001.
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* - Goes through the given string, and replaces xxxx://yyyy with an HTML <a> tag linking
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* to that URL
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* - Goes through the given string, and replaces www.xxxx.yyyy[zzzz] with an HTML <a> tag linking
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* to http://www.xxxx.yyyy[/zzzz]
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* - Goes through the given string, and replaces xxxx@yyyy with an HTML mailto: tag linking
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* to that email address
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* - Only matches these 2 patterns either after a space, or at the beginning of a line
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*
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* Notes: the email one might get annoying - it's easy to make it more restrictive, though.. maybe
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* have it require something like xxxx@yyyy.zzzz or such. We'll see.
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*/
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function make_clickable($text)
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{
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// pad it with a space so we can match things at the start of the 1st line.
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$ret = " " . $text;
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// matches an "xxxx://yyyy" URL at the start of a line, or after a space.
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// xxxx can only be alpha characters.
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// yyyy is anything up to the first space, newline, or comma.
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$ret = preg_replace("#([\n ])([a-z]+?)://([^, \n\r]+)#i", "\\1<a href=\"\\2://\\3\" target=\"_blank\">\\2://\\3</a>", $ret);
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// matches a "www.xxxx.yyyy[/zzzz]" kinda lazy URL thing
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// Must contain at least 2 dots. xxxx contains either alphanum, or "-"
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// yyyy contains either alphanum, "-", or "."
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// zzzz is optional.. will contain everything up to the first space, newline, or comma.
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// This is slightly restrictive - it's not going to match stuff like "forums.foo.com"
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// This is to keep it from getting annoying and matching stuff that's not meant to be a link.
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$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>", $ret);
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// matches an email@domain type address at the start of a line, or after a space.
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// Note: before the @ sign, the only valid characters are the alphanums and "-", "_", or ".".
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// After the @ sign, we accept anything up to the first space, linebreak, or comma.
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$ret = preg_replace("#([\n ])([a-z0-9\-_.]+?)@([^, \n\r]+)#i", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $ret);
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// Remove our padding..
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$ret = substr($ret, 1);
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return($ret);
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}
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/**
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* Nathan Codding - Feb 6, 2001
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* Reverses the effects of make_clickable(), for use in editpost.
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* - Does not distinguish between "www.xxxx.yyyy" and "http://aaaa.bbbb" type URLs.
|
|
*
|
|
*/
|
|
|
|
function undo_make_clickable($text) {
|
|
|
|
$text = preg_replace("#<!-- BBCode auto-link start --><a href=\"(.*?)\" target=\"_blank\">.*?</a><!-- BBCode auto-link end -->#i", "\\1", $text);
|
|
$text = preg_replace("#<!-- BBcode auto-mailto start --><a href=\"mailto:(.*?)\">.*?</a><!-- BBCode auto-mailto end -->#i", "\\1", $text);
|
|
|
|
return $text;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Nathan Codding - August 24, 2000.
|
|
* Takes a string, and does the reverse of the PHP standard function
|
|
* htmlspecialchars().
|
|
*/
|
|
function undo_htmlspecialchars($input) {
|
|
$input = preg_replace("/>/i", ">", $input);
|
|
$input = preg_replace("/</i", "<", $input);
|
|
$input = preg_replace("/"/i", "\"", $input);
|
|
$input = preg_replace("/&/i", "&", $input);
|
|
|
|
return $input;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* This is used to change a [*] tag into a [*:$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);
|
|
}
|
|
|
|
|
|
|
|
?>
|