Home >php教程 >PHP源码 >php过滤恶意字符

php过滤恶意字符

PHP中文网
PHP中文网Original
2016-05-26 08:19:301347browse

php过滤恶意字符

//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);
  
$str=str_replace("=strlen($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);
  
$str=str_replace("&#39;",chr(39),$str);
  
$str=str_replace("
  
",chr(13),$str);
  
$str=str_replace("&#39;&#39;","&#39;",$str);
  
$str=str_replace("css","&#39;",$str);
  
$str=str_replace("CSS","&#39;",$str);
  
return $str;
  
//HTML标签,可以作为扩展过滤
  

  
}

                   

以上就是php过滤恶意字符的内容,更多相关内容请关注PHP中文网(www.php.cn)!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn