bbcode.php

这是php编的论坛的原代码

				//
				if( preg_match('#\[quote=\\\"#si', $possible_start, $match) && !preg_match('#\[quote=\\\"(.*?)\\\"\]#si', $possible_start) )
				{
					// OK we are in a quote tag that probably contains a ] bracket.
					// Grab a bit more of the string to hopefully get all of it..
					if ($close_pos = strpos($text, '"]', $curr_pos + 9))
					{
						$possible_start = substr($text, $curr_pos, $close_pos - $curr_pos + 2);
					}
				}

				// Now compare, either using regexp or not.
				if ($open_is_regexp)
				{
					$match_result = array();
					if (preg_match($open_tag[$i], $possible_start, $match_result))
					{
						$found_start = true;
						$which_start_tag = $match_result[0];
						$start_tag_index = $i;
						break;
					}
				}
				else
				{
					// straightforward string comparison.
					if (0 == strcasecmp($open_tag[$i], $possible_start))
					{
						$found_start = true;
						$which_start_tag = $open_tag[$i];
						$start_tag_index = $i;
						break;
					}
				}
			}

			if ($found_start)
			{
				// We have an opening tag.
				// Push its position, the text we matched, and its index in the open_tag array on to the stack, and then keep going to the right.
				$match = array("pos" => $curr_pos, "tag" => $which_start_tag, "index" => $start_tag_index);
				bbcode_array_push($stack, $match);
				//
				// Rather than just increment $curr_pos
				// Set it to the ending of the tag we just found
				// Keeps error in nested tag from breaking out
				// of table structure..
				//
				$curr_pos += strlen($possible_start);
			}
			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'];
						$start_tag = $match['tag'];
						$start_length = strlen($start_tag);
						$start_tag_index = $match['index'];

						if ($open_is_regexp)
						{
							$start_tag = preg_replace($open_tag[$start_tag_index], $open_regexp_replace[$start_tag_index], $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))
						{
							if ($open_tag[0] == '[code]')
							{
								$code_entities_match = array('#<#', '#>#', '#"#', '#:#', '#\[#', '#\]#', '#\(#', '#\)#', '#\{#', '#\}#');
								$code_entities_replace = array('&lt;', '&gt;', '&quot;', '&#58;', '&#91;', '&#93;', '&#40;', '&#41;', '&#123;', '&#125;');
								$between_tags = preg_replace($code_entities_match, $code_entities_replace, $between_tags);
							}
							$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:$uid]";
						}
						else
						{
							if ($open_tag[0] == '[code]')
							{
								$text = $before_start_tag . '&#91;code&#93;';
								$text .= $between_tags . '&#91;/code&#93;';
							}
							else
							{
								if ($open_is_regexp)
								{
									$text = $before_start_tag . $start_tag;
								}
								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, $bbcode_tpl)
{
	global $lang;

	$code_start_html = $bbcode_tpl['code_open'];
	$code_end_html =  $bbcode_tpl['code_close'];

	// 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];

		// Replace 2 spaces with "&nbsp; " so non-tabbed code indents without making huge long lines.
		$after_replace = str_replace("  ", "&nbsp; ", $after_replace);
		// now Replace 2 spaces with " &nbsp;" to catch odd #s of spaces.
		$after_replace = str_replace("  ", " &nbsp;", $after_replace);

		// Replace tabs with "&nbsp; &nbsp;" so tabbed code indents sorta right without making huge long lines.
		$after_replace = str_replace("\t", "&nbsp; &nbsp;", $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 [e-mail] 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, comma, double quote or <
	$ret = preg_replace("#([\t\r\n ])([a-z0-9]+?){1}://([\w\-]+\.([\w\-]+\.)*[\w]+(:[0-9]+)?(/[^ \"\n\r\t<]*)?)#i", '\1<a href="\2://\3" target="_blank">\2://\3</a>', $ret);

	// matches a "www|ftp.xxxx.yyyy[/zzzz]" kinda lazy URL thing
	// Must contain at least 2 dots. xxxx contains either alphanum, or "-"
	// zzzz is optional.. will contain everything up to the first space, newline, 
	// comma, double quote or <.
	$ret = preg_replace("#([\t\r\n ])(www|ftp)\.(([\w\-]+\.)*[\w]+(:[0-9]+)?(/[^ \"\n\r\t<]*)?)#i", '\1<a href="http://\2.\3" target="_blank">\2.\3</a>', $ret);

	// matches an email@domain type address at the start of a line, or after a space.
	// Note: Only the followed chars are valid; alphanums, "-", "_" and or ".".
	$ret = preg_replace("#([\n ])([a-z0-9\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#i", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $ret);

	// Remove our padding..
	$ret = substr($ret, 1);

	return($ret);
}

/**
 * Nathan Codding - Feb 6, 2001
 * Reverses the effects of make_clickable(), for use in editpost.
 * - 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("/&gt;/i", ">", $input);
	$input = preg_replace("/&lt;/i", "<", $input);
	$input = preg_replace("/&quot;/i", "\"", $input);
	$input = preg_replace("/&amp;/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);
}

//
// Smilies code ... would this be better tagged on to the end of bbcode.php?
// Probably so and I'll move it before B2
//
function smilies_pass($message)
{
   static $orig, $repl;

   if (!isset($orig))
   {
      global $db, $board_config;
      $orig = $repl = array();

      $sql = 'SELECT code, smile_url FROM ' . SMILIES_TABLE;
      if( !$result = $db->sql_query($sql) )
      {
         message_die(GENERAL_ERROR, "Couldn't obtain smilies data", "", __LINE__, __FILE__, $sql);
      }
      $smilies = $db->sql_fetchrowset($result);

      usort($smilies, 'smiley_sort');
      for($i = 0; $i < count($smilies); $i++)
      {
         $orig[] = "/(?<=.\W|\W.|^\W)" . phpbb_preg_quote($smilies[$i]['code'], "/") . "(?=.\W|\W.|\W$)/";
         $repl[] = '<img src="'. $board_config['smilies_path'] . '/' . $smilies[$i]['smile_url'] . '" alt="' . $smilies[$i]['smile_url'] . '" border="0" />';
      }
   }

   if (count($orig))
   {
      $message = preg_replace($orig, $repl, ' ' . $message . ' ');
      $message = substr($message, 1, -1);
   }
   return $message;
}

function smiley_sort($a, $b)
{
	if ( strlen($a['code']) == strlen($b['code']) )
	{
		return 0;
	}

	return ( strlen($a['code']) > strlen($b['code']) ) ? -1 : 1;
}


?>