Adding a custom vendor lib to Symfony2 autoload

Question

I have been trying this for hours now - and I can't seem to find any posts that work. I am adding custom php classes to the Symfony2 vendor directory.

For example (copied other vendor structure):

vendor/mylib/mylib/src/Mylib/Lib/Class.php

I then updated the root composer.json by adding:

"require": {
    "mylib/mylib": "@dev"
},

I also created a composer.json in vendor/mylib/mylib which contained:

{
    "name": "mylib/mylib",
    "type": "library",
    "description": "My Libraty",
    "keywords": ["library"],
    "autoload": {
        "psr-0": { "Mylib\\": "src/" }
    },
    "minimum-stability": "dev"
}

I have added a namespace in Class.php:

namespace MyLib\Lib;

In one of my bundles I have added the below:

use MyLib\Lib\ClassName as ClassName;
class Cms extends ClassName
{}

The error I am getting is:

FatalErrorException: Error: Class 'MyLib\Lib\MyClass' not found in C:\xampp\htdocs\My_CMS\src\Cms\CmsBundle\Entity\Cms.php line 13

What am I doing wrong?

Answer 1

You really should be using service containers which is basically the symfony way to load classes.

Here's why:

1. Namely, a service is never constructed until it's needed.
2. Best practice for reuse of code.
3. Separating each piece of functionality in your application.
4. Since each service does just one job, you can easily access each service and use its functionality wherever you need it.
5. Each service can also be more easily tested and configured since it's separated from the other functionality in your application.
6. This idea is called service-oriented architecture and is not unique to Symfony or even PHP.

http://symfony.com/doc/current/book/service_container.html

A Service Container (or dependency injection container) is simply a PHP object that manages the instantiation of services (i.e. objects).

So basically symfony will handle instantiation of classes for you in your controller. All you need to do is the following:

Add a folder under your path called Libraries --> src/AppBundle/Libraries

Add the class to this folder with a namespace at the top. My example is:

    <?php

namespace AppBundle\Libraries;

class MyRecommendations{


    public function __construct(){

    }

    public function init(){
        die("init");
    }


}

Then add a file called services.yml to your app. app/config/services.yml

Put the following code in it do not use tabbing in the yml file

services:
    myrecommendations:
        class:        AppBundle\Libraries\MyRecommendations
        #arguments:    [specialparamhere]  #constructor parameters here

Then add the third line resources: services.yml to your config.yml file.

imports:
    - { resource: parameters.yml }
    - { resource: security.yml }
    - { resource: services.yml }

At the top of your controller when using just add the use statement

use AppBundle\Libraries\MyRecommendations;

Now call your code

$test = $this->get('myrecommendations');
            $test->init();

echo's out

init

Answer 2

In php classes are autoloaded via __autoload

Symfony takes care about it in it's Class Loader but in fact it works the same way. There is no background scaning all directories so you have to add your namespace manually.

You need to add in your autoload.php file:

$loader->add('NAMESPACE','/path/to/vendor');