php 用户注册类

<?php
class UserRegistration {
    private $db;

    public function __construct($db) {
        $this->db = $db;
    }

    public function registerUser($username, $email, $password) {
        // 验证输入
        if (empty($username) || empty($email) || empty($password)) {
            return false;
        }

        // 检查用户名和邮箱是否已存在
        if ($this->isUserExists($username, $email)) {
            return false;
        }

        // 密码加密
        $hashedPassword = password_hash($password, PASSWORD_DEFAULT);

        // 插入数据库
        $stmt = $this->db->prepare("INSERT INTO users (username, email, password) VALUES (?, ?, ?)");
        $stmt->bind_param("sss", $username, $email, $hashedPassword);

        if ($stmt->execute()) {
            return true;
        } else {
            return false;
        }
    }

    private function isUserExists($username, $email) {
        $stmt = $this->db->prepare("SELECT * FROM users WHERE username = ? OR email = ?");
        $stmt->bind_param("ss", $username, $email);
        $stmt->execute();
        $result = $stmt->get_result();
        return $result->num_rows > 0;
    }
}
?>