简单实用的PHP防注入类实例_php技巧

<?php
/**
* 参数处理类
* @author JasonWei
*/
class Params
{
public $get = array();

public $post = array();

function __construct()
{
if (!emptyempty($_GET)) {
foreach ($_GET as $key => $val) {
if (is_numeric($val)) {
$this->get[$key] = $this->getInt($val);
} else {
$this->get[$key] = $this->getStr($val);
}
}
}
if (!emptyempty($_POST)) {
foreach ($_POST as $key => $val) {
if (is_numeric($val)) {
$this->post[$key] = $this->getInt($val);
} else {
$this->post[$key] = $this->getStr($val);
}
}
}
}

public function getInt($number)
{
return intval($number);
}

public function getStr($string)
{
if (!get_magic_quotes_gpc()) {
$string = addslashes($string);
}
return $string;
}

public function checkInject($string)
{
return eregi('select|insert|update|delete|/*|*|../|./|union|into|load_file|outfile', $string);
}

public function verifyId($id = null)
{
if (!$id || $this->checkInject($id) || !is_numeric($id)) {
$id = false;
} else {
$id = intval($id);
}
return $id;
}
}
?>

<?php
/*************************
说明：
判断传递的变量中是否含有非法字符

如$_POST、$_GET
功能：
防注入
*************************/
//要过滤的非法字符
$ArrFiltrate=array("'","or","and","union","where");
//出错后要跳转的url,不填则默认前一页
$StrGoUrl="";
//是否存在数组中的值
function FunStringExist($StrFiltrate,$ArrFiltrate){
foreach ($ArrFiltrate as $key=>$value){
if (eregi($value,$StrFiltrate)){
return true;
}
}
return false;
}
//合并$_POST 和 $_GET
if(function_exists(array_merge)){
$ArrPostAndGet=array_merge($HTTP_POST_VARS,$HTTP_GET_VARS);
}else{
foreach($HTTP_POST_VARS as $key=>$value){
$ArrPostAndGet[]=$value;
}
foreach($HTTP_GET_VARS as $key=>$value){
$ArrPostAndGet[]=$value;
}
}
//验证开始
foreach($ArrPostAndGet as $key=>$value){
if (FunStringExist($value,$ArrFiltrate)){
echo "";
if (emptyempty($StrGoUrl)){
echo "history.go(-1);";
}else{
echo "window.location='".$StrGoUrl."';";
}
exit;
}
}
/***************结束防止PHP注入*****************/
?>