php三个函数、两种选择防止sql注入

$username=addslashes($username);

$username=mysql_escape_string($username);

$username=mysql_real_escape_string($username);

$stmt = $pdo->prepare('SELECT * FROM user WHERE name = :name');
$stmt->execute(array(':name' => $name));
foreach ($stmt as $row) {
// do something with $row
}

$stmt = $dbConnection->prepare('SELECT * FROM user WHERE name = ?');
$stmt->bind_param('s', $name);
$stmt->execute();
$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
// do something with $row
}