1. learn how to create a package
2. bind it in a loC container
3. create a provider and a facade
4. deploy on packagist if you like

If the Table.php class is a independent class with no other dependencies. You can also load them as you would load another Service class.

All you need to do is :

Specify the App directory in composer.json :

		"psr-0":{
			"Myapp":"app/"
		}

In you can drop the class anywhere for this example , app/Myapp/Lib/Table.php

<?php namespace Myapp\Lib;

class Table .... // You table class

In your controller

<?php 

use Myapp\Lib\Table as Table;

class Mycontroller ....

protected $table;

public function __contruct(Table $t){
   $this->table = $t;
}

When you type hint the class it should get injected since you don't have much ambiguity on which class the app container should load.