App\services\Database::query PHP Method

    public function query($sql)
    {
        // compile patterns
        $sql = str_replace('{table}', $this->tableName, $sql);
        $result = $this->connection->query($sql);
        if ($this->connection->error) {
            throw new Exception("Database query error: " . $this->connection->error . ", Statement: " . $sql, -1);
        }
        return $result;
    }