PHP高级混淆加密工具

输入PHP代码

PHP源代码：

<?php
// 示例PHP代码
class Database {
    private $connection;
    
    public function __construct($host, $user, $pass, $db) {
        $this->connection = new mysqli($host, $user, $pass, $db);
        if ($this->connection->connect_error) {
            die("连接失败: " . $this->connection->connect_error);
        }
    }
    
    public function query($sql) {
        $result = $this->connection->query($sql);
        if (!$result) {
            throw new Exception("查询失败: " . $this->connection->error);
        }
        return $result;
    }
    
    public function secureQuery($sql, $params = []) {
        $stmt = $this->connection->prepare($sql);
        if (!$stmt) {
            throw new Exception("预处理失败: " . $this->connection->error);
        }
        
        if (!empty($params)) {
            $types = '';
            $bindParams = [&$types];
            foreach ($params as &$param) {
                if (is_int($param)) {
                    $types .= 'i';
                } elseif (is_float($param)) {
                    $types .= 'd';
                } elseif (is_string($param)) {
                    $types .= 's';
                } else {
                    $types .= 'b';
                }
                $bindParams[] = &$param;
            }
            call_user_func_array([$stmt, 'bind_param'], $bindParams);
        }
        
        $stmt->execute();
        return $stmt->get_result();
    }
    
    public function close() {
        $this->connection->close();
    }
    
    public function getLastInsertId() {
        return $this->connection->insert_id;
    }
}

// 使用示例
try {
    $db = new Database("localhost", "root", "", "test_db");
    $result = $db->query("SELECT * FROM users");
    
    while ($row = $result->fetch_assoc()) {
        echo "用户: " . htmlspecialchars($row['username']) . "\n";
    }
    
    $db->close();
} catch (Exception $e) {
    echo "错误: " . $e->getMessage();
}
?>

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