What is the error message "Call to undefined method Datenbank::query()" indicating in the PHP code provided?

The error message "Call to undefined method Datenbank::query()" indicates that the method query() is not defined within the Datenbank class. To solve this issue, you need to define the query() method within the Datenbank class to handle database queries. 

class Datenbank {
    // Define the query method to handle database queries
    public function query($sql) {
        // Add your database query logic here
    }
}

// Example usage
$db = new Datenbank();
$db->query("SELECT * FROM table_name");

Keywords

PHP error message Call to undefined method Datenbank::query() method not found

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