【1】普通sql注入：

$sql = "INSERT INTO books(bookname, publisher, author, price, ptime,pic,detail) VALUES('{$_POST["bookname"]}', '{$_POST["publisher"]}', '{$_POST["author"]}', '{$_POST["price"]}', '".time()."', '{$up[1]}', '{$_POST["detail"]}')";

$result = mysql_query($sql);

if($result && mysql_affected_rows() > 0 ) {

echo "插入一条数据成功!";

}else {

echo "数据录入失败!";

}

直接将传入的参数不加过滤进入到数据库中

【2】宽字符注入：

条件

当mysql建表时，将表的字符集设置成gbk时(defaultcharset=gbk)

且当在php连接数据库时将数据库的字符集设置成(mysql_query("setcharacter_set_client=gbk");

(1)可利用%df%27绕过addslashes()这个函数

(2)可绕过pdo的quote()这个函数

(3)pdo的也被绕过：

第一种写法：

header("Content-type:text/html;charset=utf-8");

try {

$pdo = new PDO("mysql:host=localhost;dbname=test","root","niexinming132");

} catch (Exception $ex) {

echo "连接失败";

}

echo "连接成功";

$pdo->query("set character_set_client=gbk");

$id=$_GET["id"];

$query="select * from myuser where id=?";

echo $query;

echo "
";

$stmt=$pdo->prepare($query);

$pdostat=$stmt->execute(array($id));

foreach ($stmt->fetchAll(PDO::FETCH_ASSOC) as $row)

{

foreach ($row as $data)

{

echo $data." ";

}

echo "
";

}

第二种写法：

header("Content-type:text/html;charset=utf-8");

try {

$pdo = new PDO("mysql:host=localhost;dbname=test","root","niexinming132");

} catch (Exception $ex) {

echo "连接失败";

}

echo "连接成功";

$pdo->query("set character_set_client=gbk");

$id=$_GET["id"];

$query="select * from myuser where id=:id";

echo $query;

echo "
";

$stmt=$pdo->prepare($query);

$pdostat=$stmt->execute(array("id"=>$id));

foreach ($stmt->fetchAll(PDO::FETCH_ASSOC) as $row)

{

foreach ($row as $data)

{

echo $data." ";

}

echo "
";

echo "执行完毕";

var_dump($pdo->errorInfo());

}

利用：

显示：

连接成功select* from myuser where id=:id

1 5.5.50-0ubuntu0.14.04.1-logroot@localhost 4执行完毕