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<?php
 
class DatabaseConnector {
    private $host;
    private $username;
    private $password;
    private $database;
    private $connection;
 
    /**
     * Constructor - initialize database connection parameters
     * 
     * @param string $host Database server hostname
     * @param string $username Database username
     * @param string $password Database password
     * @param string $database Database name
     */
    public function __construct($host, $username, $password, $database) {
        $this->host = $host;
        $this->username = $username;
        $this->password = $password;
        $this->database = $database;
    }
 
    /**
     * Connect to the database
     * 
     * @return bool True if connection successful, false otherwise
     */
    public function connect() {
        try {
            // Create connection using mysqli
            $this->connection = new mysqli($this->host, $this->username, $this->password, $this->database);
            
            // Check connection
            if ($this->connection->connect_error) {
                throw new Exception("Connection failed: " . $this->connection->connect_error);
            }
            
            return true;
        } catch (Exception $e) {
            echo "Error: " . $e->getMessage();
            return false;
        }
    }
 
    /**
     * Execute a query against the database
     * 
     * @param string $query SQL query to execute
     * @return mixed Query result set or false on failure
     */
    public function executeQuery($query) {
        if (!$this->connection) {
            echo "Error: No active database connection";
            return false;
        }
 
        try {
            $result = $this->connection->query($query);
            
            if ($result === false) {
                throw new Exception("Query execution failed: " . $this->connection->error);
            }
            
            return $result;
        } catch (Exception $e) {
            echo "Error: " . $e->getMessage();
            return false;
        }
    }
 
    /**
     * Fetch all rows from a result set as an associative array
     * 
     * @param mixed $result Query result set
     * @return array Array of rows or empty array on failure
     */
    public function fetchAllRows($result) {
        $rows = [];
        
        if ($result && $result->num_rows > 0) {
            while ($row = $result->fetch_assoc()) {
                $rows[] = $row;
            }
        }
        
        return $rows;
    }
 
    /**
     * Close the database connection
     */
    public function closeConnection() {
        if ($this->connection) {
            $this->connection->close();
        }
    }
}
 
// Example usage:
/*
// Create instance with connection details
$db = new DatabaseConnector("localhost", "username", "password", "database_name");
 
// Connect to database
if ($db->connect()) {
    // Execute a query
    $query = "SELECT * FROM users WHERE active = 1";
    $result = $db->executeQuery($query);
    
    // Process the results
    if ($result) {
        $rows = $db->fetchAllRows($result);
        
        // Display the results
        foreach ($rows as $row) {
            echo "User ID: " . $row['id'] . ", Name: " . $row['name'] . "<br>";
        }
    }
    
    // Close the connection
    $db->closeConnection();
}
*/
?>