2009年9月学习phpcms2008 sp2程序源码笔记

1.  inlcude/global.func.php
中的 filter_xss() 方法，扩充[b]strip_tags()[/b]方法，把不允许的attribute都删除。常用于前台评论、留言板等用户可以提交文本数据的地方，把非法的html标签和javascript属性清除。

function filter_xss($string, $allowedtags = '', $disabledattributes = array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavaible', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragdrop', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterupdate', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmoveout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload'))
{
	if(is_array($string))
	{
		foreach($string as $key => $val) $string[$key] = filter_xss($val, ALLOWED_HTMLTAGS);
	}
	else
	{
		$string = preg_replace('/\s('.implode('|', $disabledattributes).').*?([\s\>])/', '\\2', preg_replace('/<(.*?)>/ie', "'<'.preg_replace(array('/javascript:[^\"\']*/i', '/(".implode('|', $disabledattributes).")[ \\t\\n]*=[ \\t\\n]*[\"\'][^\"\']*[\"\']/i', '/\s+/'), array('', '', ' '), stripslashes('\\1')) . '>'", strip_tags($string, $allowedtags)));
	}
	return $string;
}

代码中的 ALLOWED_HTMLTAGS 是不是改成 $allowedtags 更好？


2. include/db_mysql.class.php

function escape($string)
{
	if(!is_array($string)) return str_replace(array('\n', '\r'), array(chr(10), chr(13)), mysql_real_escape_string(preg_replace($this->search, $this->replace, $string), $this->connid));
	foreach($string as $key=>$val) $string[$key] = $this->escape($val);
	return $string;
}

此方法对需要进行数据库操作的数组和字符串有用！