问题
I recently added a package to my Laravel 4 site and now anything that uses Eloquent (or at least Eloquent with any reference to date/time) is showing a 500 error that states:
Class 'Carbon\Carbon' Not Found.
I tried running
composer install
composer update
composer dump-autoload
回答1:
Not saying this is work for you, but those are steps that usually fix Laravel, when the problem is not on your source code, of course:
cd /your/application/dir
rm bootstrap/compiled.php
rm -rf vendor
composer install --no-dev
回答2:
Yes, it can work as @oli-folkerd 's answer. However, as seen in Laracasts (Laravel 5 Fundamentals series Video 10 "forms" min 16:55), almost in top of your ControllerClass php file, just add the following (or import the class if your php editor allows you do so):
use Carbon\Carbon;
Now you can simply use Carbon
$input['published_at'] = Carbon::now();
without having to add Carbon\
回答3:
you need to add the line:
'Carbon' => 'Carbon\Carbon',
to the bottom of the 'aliases' array in app/config/app.php this will make the carbon library available everywhere in laravel.
回答4:
For all updated version you just need to
use Carbon\Carbon;
and for the global use, you can add this in app.php
'Carbon' => 'Carbon\Carbon',
回答5:
You this class in controller of Laravel.
use Carbon\Carbon;
then you simply define the carbon command for print the current date
$date = Carbon::now();
回答6:
My problem solved by just requiring nesbot/carbon just do this:
composer require nesbot/carbon
回答7:
I had this problem once when I updated a project from gitlab. The below command worked for me.
composer dump-autoload
回答8:
Some times specifying prefer-dist prefixed by “--” (aka “bare double dash”) at the end or suffixing at the end of create-project also matters while installing...
The below command was working fine in laravel 5.5 without getting an error
composer create-project laravel/laravel blog "5.5.*" --prefer-dist
But when I was about to begin installing Laravel 5.6 with this below command
composer create-project laravel/laravel blog --prefer-dist
I used to get
Whoops\Exception\ErrorException : Class 'Carbon\Carbon' not found
After referring to the official Installation Documentation
composer create-project --prefer-dist laravel/laravel blog
After executing the above command there were no exceptions raised, therefore installation succeeded, thereby generating a base64 hash key
来源：https://stackoverflow.com/questions/21366660/class-carbon-carbon-not-found