Why my autoload.php of composer doesn't work?

Question

I have a project, I use Composer and i import many thing by it... i require the autoload.php in my index (the root of project) and istead Slim, Mongo, Twig work very well. But when I call a class of Respect/Validation it doens't work; if I simply use Respect/Validation the error is:

Class 'Respect\Validation\Validator' not found in (path of file when i need it).

if I try to require also here the autoload.php the errors are:

**Warning**: require_once(vendor/autoload.php): failed to open stream: No such file or directory in (path of file when i need it)

**Fatal error**: require_once(): Failed opening required 'vendor/autoload.php' (include_path='.;C:\xampp\php\PEAR') in (path of file when i need it)

Answer 1

I had the same issue with xampp. I installed composer and used:

composer create-project --stability=dev --prefer-dist yiisoft/yii2-app-basic D:\xampp\htdocs\newapp

My issue solved now.

Answer 2

I had the same problem and i solved it by using the last version of laravel, just try this code to create your project:

composer create-project laravel/laravel exampleProject --prefer-dist

this always uses the last version.

Answer 3

Try using php composer dump-autoload. It may fix that problem.

Answer 4

I solved simple re-run composer update from the project Root. (my case was on Magento2, but the error and the path are the same)

Answer 5

I did this. i checked the file and permissions as always but everything looks ok. Then I open autoload.php and see ... oh! we have __DIR__ ofcourse.

I was doing this

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

Changed to

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

Not politically correct but got me by the frustrating waste of time for the moment.

ofcourse there are better alternatives to __DIR__ like using a BASE Path etc. But this worked for me.

Answer 6

In my case i simple forgot to change my working directory before running the command composer require cboden/ratchet in cmd this fixed it cd c:\path to project\ then composer require cboden/ratchet