简单实用的PHP防注入类实例

<?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 "<script language='javascript'>alert('传递的信息中不得包含{',or,and,union}等非法字符请您把他们换成{‘,ＯＲ,ＡＮＤ,ＵＮＩＯＮ}');</script>";?????
if (emptyempty($StrGoUrl)){?????
echo "<scriptlanguage='javascript'>history.go(-1);</script>";?????
}else{?????
echo "<scriptlanguage='javascript'>window.location='".$StrGoUrl."';</script>";?????
}?????
exit;?????
}?????
}?????
/***************结束防止PHP注入*****************/????
?>