php 防注入与字符反过滤代码
好了为php开发者提供了一款php sql 防注入与字符过滤以及各种过滤代码,实例如下:
- //==防注入自动过滤[启用后程序效率低]==
- /*
- function inject_checks($sql_str){return eregi('select|insert|update|delete|'|/*|*|../|./|union|into|load_file|outfile', $sql_str);}
- foreach ($_REQUEST as $value){if (inject_checks($value)){echo "<script language=javascript>alert('你提交的数据非法，请检查后重新提交！');</script>";exit;}}
- */
- //==防注[inject_check($sql_str)]==========================================================================================
- function inject_check($sql_str){
- if (eregi('select|insert|update|delete|union|into|load_file|outfile', $sql_str)){echo "<script language=javascript>alert('你提交的数据非法，请检查后重新提交！');</script>";exit;}
- return $sql_str;
- }
- //==字符过滤[safe_convert($string)]==============================================================================
- function safe_convert($string){ //Words Filter
- if(get_magic_quotes_gpc()){ //转义字符 加上反斜线
- $string=htmlspecialchars($string, ENT_QUOTES); //将特殊字元转成HTML字串格式如 "&"转成"&"
- $string=str_replace("<","<",$string); //替换
- $string=str_replace(">",">",$string); //替换
- $string=str_replace("\", '\', $string); //替换
- } else {
- $string=addslashes($string); //转义字符 加上反斜线 //$string=stripslashes($string); //去掉反斜线
- $string=str_replace("\\", '\', $string);
- }
- //$string=str_replace("r","<br/>",$string); //换行
- //$string=str_replace("n","",$string); //空格
- $string=str_replace("t"," ",$string); //空格
- $string=str_replace(" "," ",$string); //空格
- //$string=str_replace('|', '|', $string); //替换 同分类系统有冲突
- $string=str_replace("&#96;","`",$string); //替换
- $string=str_replace("&#92;","\",$string); //替换
- return $string;
- }
- //==字符反过滤[unsafe_convert($string)]==============================================================================
- function unsafe_convert($string){ //Words Filter
- $string=str_replace("\"",""",$string); //替换
- return $string;
- }
- //==字符过滤[filter($string)]============================================================================================
- function filter($string){ //Words Filter
- include("Filter.php");//词汇过滤列表
- foreach($badwords as $badword){
- if(stristr($string,$badword)==true){echo "<script language=javascript>alert('警告：你提交的内容含有敏感字眼，请更换内容。');</script>";exit;} //开源代码phpfensi.com
- }
- return $string;
- }