Failed Opening autoload.php in Laravel 5

You got an error because you have missing vendor folder in your project, You need /vendor because all your packages are there, including all the classes Laravel uses. The vendor directory contains your Composer dependencies.

Your problem can be resolved after following this step. you can try it:

composer update --no-scripts 
composer update

With this command, you will re-create the vendor folder in your project and after that your project will start working normally.

While Going Live This is my Project Structure

NOTE:WHILE DOING THIS YOU MAY ENCOUNTER SOME STYLE AND JAVASCRIPT REFERENCE ERROR IF YOU ARE USNIG ASSET FUNCTION NO NEED TO WORRY

<link href="{{ asset('css/app.css') }}" rel="stylesheet">

BUT IF NOT IF WILL OCCUR 404 IN SOME CASES

this is Just For Example

Step 1 : create a folder named as `ProjectFiles` in root of your application

Step 2: copy all the contents except and folder except `public` folder and paste inside `ProjectFiles` folder

Step3: now cut and paste all the contents inside the public folder in root of your application root

step4: open your index.php file and make the following changes

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

to

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

AND

$app = require_once __DIR__.'/../bootstrap/app.php';

to

$app = require_once __DIR__.'/ProjectFiles/bootstrap/app.php';

and then upload your project to live cpanel server

here is my cpanel server directory structure

hope it helps if the answer is not clear please comment below if the error continues

I got this error after trying to start the dev server using php artisan serve This is how I resolved it:

1. Run composer install

In case you get an error like "Your requirements could not be resolved to an installable set of packages", make sure you have the necessary extensions enabled in your php.ini config. In my case I needed to enable extension=fileinfo

1. Run composer update. After this you should be able to start the server with no errors.

Run composer with --no-scripts

composer update --no-scripts  

This shall fix the issue.

You must provide Read and write permissions to your project and generate a key in your .env file

Run the following commands inside your project dir and you would be good to go :

$ sudo chmod -R 777 /storage /public /bootstrap

$ composer install

$ php artisan key:generate

In my case the issue was a missing extension in my php-cli. Using Ubuntu 23 I had to call sudo apt install php-curl then I could call composer install and start the server.