- //php 批量过滤post,get敏感数据
- if (get_magic_quotes_gpc()) {
- $_GET = stripslashes_array($_GET);
- $_POST = stripslashes_array($_POST);
- }
- function stripslashes_array(&$array) {
- while(list($key,$var) = each($array)) {
- if ($key != 'argc' && $key != 'argv' && (strtoupper($key) != $key || ''.intval($key) == "$key")) {
- if (is_string($var)) {
- $array[$key] = stripslashes($var);
- }
- if (is_array($var)) {
- $array[$key] = stripslashes_array($var);
- }
- }
- }
- return $array;
- }
- //过滤
- function htmlencode($str){
- if(empty($str)) return;
- if($str=="") return $str;
- $str=trim($str);
- $str=str_replace("&","&",$str);
- $str=str_replace(">",">",$str);
- $str=str_replace("<","<",$str);
- $str=str_replace(chr(32)," ",$str);
- $str=str_replace(chr(9)," ",$str);
- $str=str_replace(chr(9)," ",$str);
- $str=str_replace(chr(34),"&",$str);
- $str=str_replace(chr(39),"'",$str);
- $str=str_replace(chr(13),"
- ",$str);
- $str=str_replace("'","''",$str);
- $str=str_replace("select","select",$str);
- $str=str_replace("SCRIPT","SCRIPT",$str);
- $str=str_replace("script","script",$str);
- $str=str_replace("join","join",$str);
- $str=str_replace("union","union",$str);
- $str=str_replace("where","where",$str);
- $str=str_replace("insert","insert",$str);
- $str=str_replace("delete","delete",$str);
- $str=str_replace("update","update",$str);
- $str=str_replace("like","like",$str);
- $str=str_replace("drop","drop",$str);
- $str=str_replace("create","create",$str);
- $str=str_replace("modify","modify",$str);
- $str=str_replace("rename","rename",$str);
- $str=str_replace("alter","alter",$str);
- $str=str_replace("cast","cas",$str);
- return $str;
- }
- //解码
- function htmldecode($str){
- if(empty($str)) return;
- if($str=="") return $str;
- $str=str_replace("select","select",$str);
- $str=str_replace("join","join",$str);
- $str=str_replace("union","union",$str);
- $str=str_replace("where","where",$str);
- $str=str_replace("insert","insert",$str);
- $str=str_replace("delete","delete",$str);
- $str=str_replace("update","update",$str);
- $str=str_replace("like","like",$str);
- $str=str_replace("drop","drop",$str);
- $str=str_replace("create","create",$str);
- $str=str_replace("modify","modify",$str);
- $str=str_replace("rename","rename",$str);
- $str=str_replace("alter","alter",$str);
- $str=str_replace("cas","cast",$str);
- $str=str_replace("&","&",$str);
- $str=str_replace(">",">",$str);
- $str=str_replace("<","<",$str);
- $str=str_replace(" ",chr(32),$str);
- $str=str_replace(" ",chr(9),$str);
- $str=str_replace(" ",chr(9),$str);
- $str=str_replace("&",chr(34),$str);
- $str=str_replace("'",chr(39),$str);
- $str=str_replace("
- ",chr(13),$str);
- $str=str_replace("''","'",$str);
- return $str;
- }
- // 函数:string_filter($string, $match_type=1)
- // 功能:过滤非法内容
- // 参数:
- // $string 需要检查的字符串
- // $match_type 匹配类型,1为精确匹配, 2为模糊匹配,默认为1
- //
- // 返回:有非法内容返回True,无非法内容返回False
- // 其他:非法关键字列表保存在txt文件里, 分为普通非法关键字和严重非法关键字两个列表
- // 作者:heiyeluren
- // 时间:2006-1-18
- //
- //======================================================================
- function lib_lawless_string_filter($string, $match_type=1)
- {
- //字符串空直接返回为非法
- $string = trim($string);
- if (empty($string))
- {
- return false;
- }
- //获取重要关键字列表和普通关键字列表
- $common_file = "common_list.txt"; //通用过滤关键字列表
- $signify_file = "signify_list.txt"; //重要过滤关键字列表
- //如果任何列表文件不存在直接返回false,否则把两个文件列表读取到两个数组里
- if (!file_exists($common_file) || !file_exists($signify_file))
- {
- return false;
- }
- $common_list = file($common_file);
- $signify_list = file($signify_file);
- //精确匹配
- if ($match_type == 1)
- {
- $is_lawless = exact_match($string, $common_list);
- }
- //模糊匹配
- if ($match_type == 2)
- {
- $is_lawless = blur_match($string, $common_list, $signify_list);
- }
- //判断检索结果数组中是否有数据,如果有,证明是非法的
- if (is_array($is_lawless) && !empty($is_lawless))
- {
- return true;
- }
- else
- {
- return false;
- }
- }
- //---------------------
- // 精确匹配,为过滤服务
- //---------------------
- function exact_match($string, $common_list)
- {
- $string = trim($string);
- $string = lib_replace_end_tag($string);
- //检索普通过滤关键字列表
- foreach($common_list as $block)
- {
- $block = trim($block);
- if (preg_match("/^$string$/i", $block))
- {
- $blist[] = $block;
- }
- }
- //判断有没有过滤内容在数组里
- if (!empty($blist))
- {
- return array_unique($blist);
- }
- return false;
- }
- //----------------------
- // 模糊匹配,为过滤服务
- //----------------------
- function blur_match($string, $common_list, $signify_list)
- {
- $string = trim($string);
- $s_len = strlen($string);
- $string = lib_replace_end_tag($string);
- //检索普通过滤关键字列表
- foreach($common_list as $block)
- {
- $block = trim($block);
- if (preg_match("/^$string$/i", $block))
- {
- $blist[] = $block;
- }
- }
- //检索严重过滤关键字列表
- foreach($signify_list as $block)
- {
- $block = trim($block);
- if ($s_len>=strlen($block) && preg_match("/$block/i", $string))
- {
- $blist[] = $block;
- }
- }
- //判断有没有过滤内容在数组里
- if (!empty($blist))
- {
- return array_unique($blist);
- }
- return false;
- }
- //--------------------------
- // 替换HTML尾标签,为过滤服务
- //--------------------------
- function lib_replace_end_tag($str)
- {
- if (empty($str)) return false;
- $str = htmlspecialchars($str);
- $str = str_replace( '/', "", $str);
- $str = str_replace("\\\\", "", $str);
- $str = str_replace(">", "", $str);
- $str = str_replace("<", "", $str);
- $str = str_replace("", "", $str);
- $str = str_replace("", "", $str);
- $str=str_replace("select","select",$str);
- $str=str_replace("join","join",$str);
- $str=str_replace("union","union",$str);
- $str=str_replace("where","where",$str);
- $str=str_replace("insert","insert",$str);
- $str=str_replace("delete","delete",$str);
- $str=str_replace("update","update",$str);
- $str=str_replace("like","like",$str);
- $str=str_replace("drop","drop",$str);
- $str=str_replace("create","create",$str);
- $str=str_replace("modify","modify",$str);
- $str=str_replace("rename","rename",$str);
- $str=str_replace("alter","alter",$str);
- $str=str_replace("cas","cast",$str);
- $str=str_replace("&","&",$str);
- $str=str_replace(">",">",$str);
- $str=str_replace("<","<",$str);
- $str=str_replace(" ",chr(32),$str);
- $str=str_replace(" ",chr(9),$str);
- $str=str_replace(" ",chr(9),$str);
- $str=str_replace("&",chr(34),$str);
- $str=str_replace("'",chr(39),$str);
- $str=str_replace("
- ",chr(13),$str);
- $str=str_replace("''","'",$str);
- $str=str_replace("css","'",$str);
- $str=str_replace("CSS","'",$str);
- return $str;
- //HTML标签,可以作为扩展过滤
- }
来源: http://www.phpxs.com/code/1003226/