module.textsanitizer.php

讲的是网络编程

<?php
// $Id: module.textsanitizer.php 1276 2008-01-26 06:31:31Z phppp $
//  ------------------------------------------------------------------------ //
//                XOOPS - PHP Content Management System                      //
//                    Copyright (c) 2000 XOOPS.org                           //
//                       <http://www.xoops.org/>                             //
//  ------------------------------------------------------------------------ //
//  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.                                      //
//                                                                           //
//  You may not change or alter any portion of this comment or credits       //
//  of supporting developers from this source code or any supporting         //
//  source code which is considered copyrighted (c) material of the          //
//  original comment or credit authors.                                      //
//                                                                           //
//  This program is distributed in the hope that it will be useful,          //
//  but WITHOUT ANY WARRANTY; without even the implied warranty of           //
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            //
//  GNU General Public License for more details.                             //
//                                                                           //
//  You should have received a copy of the GNU General Public License        //
//  along with this program; if not, write to the Free Software              //
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA //
//  ------------------------------------------------------------------------ //
// Author: Kazumi Ono (http://www.myweb.ne.jp/, http://jp.xoops.org/)        //
//         Goghs Cheng (http://www.eqiao.com, http://www.devbeez.com/)       //
// Project: The XOOPS Project (http://www.xoops.org/)                        //
// ------------------------------------------------------------------------- //

/**
 * Class to "clean up" text for various uses
 *
 * <b>Singleton</b>
 *
 * @package		kernel
 * @subpackage	core
 *
 * @author		Kazumi Ono 	<[e-mail]>
 * @author      Goghs Cheng
 * @copyright	(c) 2000-2003 The Xoops Project - www.xoops.org
 */
class MyTextSanitizer
{
	/**
	 * @var	array
	 */
	var $smileys = array();

	/**
	 *
	 */
	var $censorConf;

	/*
	* Constructor of this class
    *
	* Gets allowed html tags from admin config settings
	* <br> should not be allowed since nl2br will be used
	* when storing data.
    *
    * @access	private
    *
    * @todo Sofar, this does nuttin' ;-)
	*/
	function MyTextSanitizer()
	{

	}

	/**
	 * Access the only instance of this class
     *
     * @return	object
     *
     * @static
     * @staticvar   object
	 */
	function &getInstance()
	{
		static $instance;
		if (!isset($instance)) {
			$instance = new MyTextSanitizer();
		}
		return $instance;
	}

	/**
	 * Get the smileys
     *
     * @param	boole  $isAll TRUE for all smileys, FALSE for smileys with display = 1
     * @return	array
	 */
	function getSmileys( $isAll = TRUE )
	{
		if (count($this->smileys) == 0) {
			if ($getsmiles = $GLOBALS["xoopsDB"]->query("SELECT * FROM ".$GLOBALS["xoopsDB"]->prefix("smiles"))) {
				while ($smiles = $GLOBALS["xoopsDB"]->fetchArray($getsmiles)) {
					array_push($this->smileys, $smiles);
				}
			}
		}
		if ($isAll) {
		    return $this->smileys;
	    }
	    
	    $smileys = array();
		foreach ($this->smileys as $smile) {
    		if (empty($smile['display'])) continue;
    		$smileys[] = $smile;
		}
	    return $smileys;
	}

    /**
     * Replace emoticons in the message with smiley images
     *
     * @param	string  $message
     *
     * @return	string
     */
    function smiley($message)
	{
    	$smileys = $this->getSmileys();
		foreach ($smileys as $smile) {
			$message = str_replace($smile['code'], '<img src="'.XOOPS_UPLOAD_URL.'/'.htmlspecialchars($smile['smile_url']).'" alt="" />', $message);
		}
		return $message;
	}

	/**
	 * Make links in the text clickable
	 *
	 * @param   string  $text
	 * @return  string
	 **/
	function makeClickable(&$text)
	{
		$patterns = array("/(^|[^]_a-z0-9-=\"'\/])([a-z]+?):\/\/([^, \r\n\"\(\)'<>]+)/i", "/(^|[^]_a-z0-9-=\"'\/])www\.([a-z0-9\-]+)\.([^, \r\n\"\(\)'<>]+)/i", "/(^|[^]_a-z0-9-=\"'\/])ftp\.([a-z0-9\-]+)\.([^, \r\n\"\(\)'<>]+)/i", "/(^|[^]_a-z0-9-=\"'\/:\.])([a-z0-9\-_\.]+?)@([^, \r\n\"\(\)'<>\[\]]+)/i");
		$replacements = array("\\1<a href=\"\\2://\\3\" target=\"_blank\">\\2://\\3</a>", "\\1<a href=\"http://www.\\2.\\3\" target=\"_blank\">www.\\2.\\3</a>", "\\1<a href=\"ftp://ftp.\\2.\\3\" target=\"_blank\">ftp.\\2.\\3</a>", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>");
		return preg_replace($patterns, $replacements, $text);
	}

	/**
	 * Replace XoopsCodes with their equivalent HTML formatting
	 *
	 * @param   string  $text
	 * @param   bool    $allowimage Allow images in the text?
     *                              On FALSE, uses links to images.
	 * @return  string
	 **/
	function &xoopsCodeDecode(&$text, $allowimage = 1)
	{
		$patterns = array();
		$replacements = array();
		//$patterns[] = "/\[code](.*)\[\/code\]/esU";
		//$replacements[] = "'<div class=\"xoopsCode\"><code><pre>'.wordwrap(MyTextSanitizer::htmlSpecialChars('\\1'), 100).'</pre></code></div>'";
		// RMV: added new markup for intrasite url (allows easier site moves)
		// TODO: automatically convert other URLs to this format if XOOPS_URL matches??
		$patterns[] = "/\[siteurl=(['\"]?)([^\"'<>]*)\\1](.*)\[\/siteurl\]/sU";
		$replacements[] = '<a href="'.XOOPS_URL.'/\\2">\\3</a>';
		$patterns[] = "/\[url=(['\"]?)(http[s]?:\/\/[^\"'<>]*)\\1](.*)\[\/url\]/sU";
		$replacements[] = '<a href="\\2" target="_blank">\\3</a>';
		$patterns[] = "/\[url=(['\"]?)(ftp?:\/\/[^\"'<>]*)\\1](.*)\[\/url\]/sU";
		$replacements[] = '<a href="\\2" target="_blank">\\3</a>';
		$patterns[] = "/\[url=(['\"]?)([^\"'<>]*)\\1](.*)\[\/url\]/sU";
		$replacements[] = '<a href="http://\\2" target="_blank">\\3</a>';
		$patterns[] = "/\[color=(['\"]?)([a-zA-Z0-9]*)\\1](.*)\[\/color\]/sU";
		$replacements[] = '<span style="color: #\\2;">\\3</span>';
		$patterns[] = "/\[size=(['\"]?)([a-z0-9-]*)\\1](.*)\[\/size\]/sU";
		$replacements[] = '<span style="font-size: \\2;">\\3</span>';
		$patterns[] = "/\[font=(['\"]?)([^;<>\*\(\)\"']*)\\1](.*)\[\/font\]/sU";
		$replacements[] = '<span style="font-family: \\2;">\\3</span>';
		$patterns[] = "/\[email]([^;<>\*\(\)\"']*)\[\/email\]/sU";
		$replacements[] = '<a href="mailto:\\1">\\1</a>';
		$patterns[] = "/\[b](.*)\[\/b\]/sU";
		$replacements[] = '<b>\\1</b>';
		$patterns[] = "/\[i](.*)\[\/i\]/sU";
		$replacements[] = '<i>\\1</i>';
		$patterns[] = "/\[u](.*)\[\/u\]/sU";
		$replacements[] = '<u>\\1</u>';
		$patterns[] = "/\[d](.*)\[\/d\]/sU";
		$replacements[] = '<del>\\1</del>';
		//$patterns[] = "/\[li](.*)\[\/li\]/sU";
		//$replacements[] = '<li>\\1</li>';
		$patterns[] = "/\[img align=(['\"]?)(left|center|right)\\1]([^\"\(\)\?\&'<>]*)\[\/img\]/sU";
		$patterns[] = "/\[img]([^\"\(\)\?\&'<>]*)\[\/img\]/sU";
		$patterns[] = "/\[img align=(['\"]?)(left|center|right)\\1 id=(['\"]?)([0-9]*)\\3]([^\"\(\)\?\&'<>]*)\[\/img\]/sU";
		$patterns[] = "/\[img id=(['\"]?)([0-9]*)\\1]([^\"\(\)\?\&'<>]*)\[\/img\]/sU";
		if ($allowimage != 1) {
			$replacements[] = '<a href="\\3" target="_blank">\\3</a>';
			$replacements[] = '<a href="\\1" target="_blank">\\1</a>';
			$replacements[] = '<a href="'.XOOPS_URL.'/image.php?id=\\4" target="_blank">\\5</a>';
			$replacements[] = '<a href="'.XOOPS_URL.'/image.php?id=\\2" target="_blank">\\3</a>';
		} else {
			$replacements[] = '<img src="\\3" align="\\2" alt="" />';
			$replacements[] = '<img src="\\1" alt="" />';
			$replacements[] = '<img src="'.XOOPS_URL.'/image.php?id=\\4" align="\\2" alt="\\5" />';
			$replacements[] = '<img src="'.XOOPS_URL.'/image.php?id=\\2" alt="\\3" />';
		}
		$patterns[] = "/\[quote]/sU";
		$replacements[] = _QUOTEC.'<div class="xoopsQuote"><blockquote>';
		//$replacements[] = 'Quote: <div class="xoopsQuote"><blockquote>';
		$patterns[] = "/\[\/quote]/sU";
		$replacements[] = '</blockquote></div>';
		$text = str_replace( "\x00", "", $text );
		$c = "[\x01-\x1f]*";
		$patterns[] = "/j{$c}a{$c}v{$c}a{$c}s{$c}c{$c}r{$c}i{$c}p{$c}t{$c}:/si";
		$replacements[] = "(script removed)";
		$patterns[] = "/a{$c}b{$c}o{$c}u{$c}t{$c}:/si";
		$replacements[] = "about :";
		$text = preg_replace($patterns, $replacements, $text);
		return $text;
	}

	/**
	 * Convert linebreaks to <br /> tags
     *
     * @param	string  $text
     *
     * @return	string
	 */
	function nl2Br($text)
	{
		return preg_replace("/(\015\012)|(\015)|(\012)/","<br />",$text);
	}

	/**
	 * Add slashes to the text if magic_quotes_gpc is turned off.
	 *
	 * @param   string  $text
	 * @return  string
	 **/
	function addSlashes($text)
	{
		if (!get_magic_quotes_gpc()) {
			$text = addslashes($text);
		}
		return $text;
	}
	/*
	* if magic_quotes_gpc is on, stirip back slashes
    *
    * @param	string  $text
    *
    * @return	string
	*/
	function stripSlashesGPC($text)
	{
		if (get_magic_quotes_gpc()) {
			$text = stripslashes($text);
		}
		return $text;
	}

	/*
	*  for displaying data in html textbox forms
    *
    * @param	string  $text
    *
    * @return	string
	*/
	function htmlSpecialChars($text)
	{
		//return preg_replace("/&amp;/i", '&', htmlspecialchars($text, ENT_QUOTES));
		return preg_replace(array("/&amp;/i", "/&nbsp;/i"), array('&', '&amp;nbsp;'), htmlspecialchars($text, ENT_QUOTES));
	}

	/**
	 * Reverses {@link htmlSpecialChars()}
	 *
	 * @param   string  $text
	 * @return  string
	 **/
	function undoHtmlSpecialChars( $text )
	{
		return preg_replace(array("/&gt;/i", "/&lt;/i", "/&quot;/i", "/&#039;/i", '/&amp;nbsp;/i'), array(">", "<", "\"", "'", "&nbsp;"), $text);
	}

	/**
	 * Filters textarea form data in DB for display
	 *
	 * @param   string  $text
	 * @param   bool    $html   allow html?
	 * @param   bool    $smiley allow smileys?
	 * @param   bool    $xcode  allow xoopscode?
	 * @param   bool    $image  allow inline images?
	 * @param   bool    $br     convert linebreaks?
	 * @return  string
	 **/