下面的代码可以有效防止 sql 注入吗 ?
大家一般是怎么做的 .
<code><?php $dbh = new PDO("mysql:host=localhost; dbname=mydb", "root", "pass");
$dbh->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); //禁用prepared statements的仿真效果
$dbh->exec("set names 'utf8'");
$sql="select * from table where username = ? and password = ?";
$query = $dbh->prepare($sql);
$exeres = $query->execute(array($username, $pass));
if ($exeres) {
while ($row = $query->fetch(PDO::FETCH_ASSOC)) {
print_r($row);
}
}
$dbh = null;
?>
</code>下面的代码可以有效防止 sql 注入吗 ?
大家一般是怎么做的 .
<code><?php $dbh = new PDO("mysql:host=localhost; dbname=mydb", "root", "pass");
$dbh->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); //禁用prepared statements的仿真效果
$dbh->exec("set names 'utf8'");
$sql="select * from table where username = ? and password = ?";
$query = $dbh->prepare($sql);
$exeres = $query->execute(array($username, $pass));
if ($exeres) {
while ($row = $query->fetch(PDO::FETCH_ASSOC)) {
print_r($row);
}
}
$dbh = null;
?>
</code>
建议这样写, 能更有效的防注入
<code>......
$sql="select * from table where username = ?";
......
while ($row = $query->fetch(PDO::FETCH_ASSOC) && $row['pass'] == $pass) {
print_r($row);
}
</code>
你的代码完全可以防止SQL注入，因为PDO就是SQL预处理的。
