php中$_GET与$_POST过滤sql注入的方法,_get_post
php中$_GET与$_POST过滤sql注入的方法,_get_post
本文实例讲述了php中$_GET与$_POST过滤sql注入的方法,分享给大家供大家参考。具体分析如下:
此函数只能过滤一些敏感的sql命令了,像id=1这种大家还是需要自己简单过滤了。
主要实现代码如下:
复制代码 代码如下:
if (!get_magic_quotes_gpc())
{
if (!empty($_GET))
{
$_GET = addslashes_deep($_GET);
}
if (!empty($_POST))
{
$_POST = addslashes_deep($_POST);
}
$_COOKIE = addslashes_deep($_COOKIE);
$_REQUEST = addslashes_deep($_REQUEST);
}
function addslashes_deep($value)
{
if (empty($value))
{
return $value;
}
else
{
return is_array($value) ? array_map('addslashes_deep', $value) : addslashes($value);
}
}
希望本文所述对大家的PHP程序设计有所帮助。
我在PHP4环境下写了一个防SQL注入的代码,经过实际使用在PHP5下也兼容,欢迎大家使用修改,使用。
代码如下:
/*
sqlin 防注入类
*/
class sqlin
{
//dowith_sql($value)
function dowith_sql($str)
{
$str = str_replace("and","",$str);
$str = str_replace("execute","",$str);
$str = str_replace("update","",$str);
$str = str_replace("count","",$str);
$str = str_replace("chr","",$str);
$str = str_replace("mid","",$str);
$str = str_replace("master","",$str);
$str = str_replace("truncate","",$str);
$str = str_replace("char","",$str);
$str = str_replace("declare","",$str);
$str = str_replace("select","",$str);
$str = str_replace("create","",$str);
$str = str_replace("delete","",$str);
$str = str_replace("insert","",$str);
$str = str_replace("'","",$str);
$str = str_replace(""","",$str);
$str = str_replace(" ","",$str);
$str = str_replace("or","",$str);
$str = str_replace("=","",$str);
$str = str_replace("%20","",$str);
//echo $str;
return $str;
}
//aticle()防SQL注入函数
function sqlin()
{
foreach ($_GET as $key=>$value)
{
$_GE......余下全文>>
用着个过滤传过来的值,这两个用之前先判断是否开启了
get_magic_quotes_gpc();没有开启的话用以下两个都可以过滤
mysql_real_escape_string();一般用于sql语句
addslashes();
例如:
if (!get_magic_quotes_gpc()) {
$lastname = addslashes($_POST[‘lastname’]);
//或者mysql_real_escape_string($_POST[‘lastname’])
} else {
$lastname = $_POST[‘lastname’];
}

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