浅析php过滤html字符串,防止SQL注入的方法_php技巧

批量过滤post,get敏感数据

$_GET = stripslashes_array($_GET);<BR>$_POST = stripslashes_array($_POST);<BR>

数据过滤函数

function stripslashes_array(&$array) {<BR> while(list($key,$var) = each($array)) {<BR>  if ($key != 'argc' && $key != 'argv' && (strtoupper($key) != $key || ''.intval($key) == "$key")) {<BR>   if (is_string($var)) {<BR>    $array[$key] = stripslashes($var);<BR>   }<BR>   if (is_array($var))  {<BR>    $array[$key] = stripslashes_array($var);<BR>   }<BR>  }<BR> }<BR> return $array; <BR>}<BR>

替换HTML尾标签,为过滤服务

function lib_replace_end_tag($str)<BR>{<BR> if (empty($str)) return false;<BR> $str = htmlspecialchars($str);<BR> $str = str_replace( '/', "", $str);<BR> $str = str_replace("\\", "", $str);<BR> $str = str_replace(">", "", $str);<BR> $str = str_replace("<", "", $str);<BR> $str = str_replace("<script>", "", $str);<BR> $str = str_replace("</script>", "", $str);<BR> $str = str_replace("<script>", "", $str);<BR> $str = str_replace("</script>", "", $str);<BR> $st<a style="color:transparent">本@文来源gao($daima.com搞@代@#码(网5</a><strong>搞gaodaima代码</strong>r=str_replace("select","select",$str);<BR> $str=str_replace("join","join",$str);<BR> $str=str_replace("union","union",$str);<BR> $str=str_replace("where","where",$str);<BR> $str=str_replace("insert","insert",$str);<BR> $str=str_replace("delete","delete",$str);<BR> $str=str_replace("update","update",$str);<BR> $str=str_replace("like","like",$str);<BR> $str=str_replace("drop","drop",$str);<BR> $str=str_replace("create","create",$str);<BR> $str=str_replace("modify","modify",$str);<BR> $str=str_replace("rename","rename",$str);<BR> $str=str_replace("alter","alter",$str);<BR> $str=str_replace("cas","cast",$str);<BR> $str=str_replace("&","&",$str);<BR> $str=str_replace(">",">",$str);<BR> $str=str_replace("<","<",$str);<BR> $str=str_replace(" ",chr(32),$str);<BR> $str=str_replace(" ",chr(9),$str);<BR> $str=str_replace("    ",chr(9),$str);<BR> $str=str_replace("&",chr(34),$str);<BR> $str=str_replace("'",chr(39),$str);<BR> $str=str_replace("<br />",chr(13),$str);<BR> $str=str_replace("''","'",$str);<BR> $str=str_replace("css","'",$str);<BR> $str=str_replace("CSS","'",$str); <BR> return $str;  <BR>}<BR>

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