connect_error) {
die("连接失败: " . $conn->connect_error);
}
// 检查是否提交表单
if ($_SERVER["REQUEST_METHOD"] === "POST") {
$name = isset($_POST['name']) ? trim($_POST['name']) : '';
$password = isset($_POST['password']) ? trim($_POST['password']) : '';
// 表单验证
if (empty($name) || empty($password)) {
echo "姓名和密码不能为空！";
} else {
// 密码加密
$hashedPassword = md5($password);
// 查询是否存在该用户
$sql = "SELECT * FROM user_70 WHERE name = ?";
$stmt = $conn->prepare($sql);
$stmt->bind_param("s", $name);
$stmt->execute();
$result = $stmt->get_result();
if ($result->num_rows > 0) {
// 用户存在，更新密码
$updateSql = "UPDATE user_70 SET password = ? WHERE name = ?";
$updateStmt = $conn->prepare($updateSql);
$updateStmt->bind_param("ss", $hashedPassword, $name);
if ($updateStmt->execute()) {
echo "密码更新成功！";
} else {
echo "密码更新失败：" . $conn->error;
}
} else {
// 用户不存在，插入新用户
$insertSql = "INSERT INTO user_70 (name, password) VALUES (?, ?)";
$insertStmt = $conn->prepare($insertSql);
$insertStmt->bind_param("ss", $name, $hashedPassword);
if ($insertStmt->execute()) {
echo "注册成功！";
} else {
echo "注册失败：" . $conn->error;
}
}
}
}
// 关闭数据库连接
$conn->close();
?>
用户注册与修改密码