一个简单的 PHP防注入类

/**
 * 参数处理类
 * @author JasonWei
 */
class Params
{
    public $get = array();
 
    public $post = array();
 
    function __construct()
    {
if (!empty($_GET)) {
    foreach ($_GET as $key => $val) {
if (is_numeric($val)) {
    $this->get[$key] = $this->getInt($val);
} else {
    $this->get[$key] = $this->getStr($val);
}
    }
}
if (!empty($_POST)) {
    foreach ($_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;
    }
}
?>

/************************* 
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 "