Composer Autoloading

Question

I'm currently trying to use PSR-0 autoloading with Composer, but I'm getting the following error:

Fatal error: Class 'Twitter\Twitter' not found

My directory structure looks like this

- Project
    - src
        - Twitter
            Twitter.php
    - vendor
    - Test
    index.php

My index.php file looks like this:

<?php

    use Twitter;
    $twitter = new Twitter();

My Twitter.php file looks like this

<?php 

namespace Twitter;

class Twitter
{
    public function __construct()
    {
        // Code Here
    }
}

And finally my composer.json looks like this:

{
"require": {
    "phpunit/phpunit": "3.8.*@dev",
    "guzzle/guzzle": "3.7.*@dev"
},
"minimum-stability": "dev",
"autoload": {
    "psr-0": {
        "Twitter" : "src/Twitter"
    }
}
}

I am getting a little confused. I come from a C# background and this way of working is kinda confusing me. What's the correct way to use PSR-0 autoloading?

You will also have to include the autoloader.php file - but then, if everything else is defined in the composer.json file, that may well be the only thing you explicitly load with a require/include. Se the Composer FAQs for more details how to use it. — Alister Bulman, Oct 01 '14 at 06:51

Gianluca Mancini · Answer 1 · 2013-11-24T21:43:26.420

11

In your composer.json use:

"autoload": {
    "psr-0": {
        "": "src/"
    }
}

or

"autoload": {
    "psr-0": {
        "Twitter\\": "src/"
    }
}

and then run php composer.phar dump-autoload

edited Nov 24 '13 at 21:43

answered Nov 24 '13 at 21:26

Gianluca Mancini

1,302
9
10

score 3 · Answer 2 · answered Nov 24 '13 at 21:26

3

Use

"psr-0": {
     "Twitter" : "src/"
 }

This instructs composer to create autoloader, that will look in src for everything from Twitter namespace. And since it is PSR-0, namespace is treated as a folder and added to declared path, so you should not include it in path part in composer.json

answered Nov 24 '13 at 21:26

dev-null-dweller

29,274
3
65
85

"so you should not include it composer.json" what do you mean by this? – James Jeffery Nov 24 '13 at 21:28
Missed few words, you should not include it in path part – dev-null-dweller Nov 24 '13 at 21:30
I'm still getting the same error. Is there any information online that explains how to do this? Are the rest of my files set up correctly? – James Jeffery Nov 24 '13 at 21:41
I forgot to add ... require 'vendor/autoload.php'; – James Jeffery Nov 24 '13 at 21:46
2

As for documentation, sure there is - http://getcomposer.org/doc/04-schema.md#autoload – dev-null-dweller Nov 24 '13 at 21:48

score 2 · Answer 3 · answered Feb 06 '16 at 12:13

First of all,

My index.php file looks like this:
use Twitter;
$twitter = new Twitter();

If it's your index.php you forgot to include the composer's autoload script first.

require __DIR__ . '/vendor/autoload.php';

See https://getcomposer.org/doc/01-basic-usage.md#autoloading for details.

score 1 · Answer 4 · answered Aug 17 '14 at 15:13

1

There is an error in your index.php, should be: use Twitter\Twitter; $twitter = new Twitter(); or $twitter = new Twitter\Twitter();

answered Aug 17 '14 at 15:13

Quim Calpe

124
4

score 0 · Answer 5 · answered Apr 23 '17 at 08:51

0

This is a very late reply but the first thing you need to make "autoloading" works is have your PHP version be 5.6 and above.

answered Apr 23 '17 at 08:51

barudo

665
4
13

Composer Autoloading

5 Answers5

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