Using Carbon api for date time codeigniter

问题:

I'm trying to use Carbon API(https://github.com/briannesbitt/Carbon) for my project in Codeigniter. But I am having trouble using it. I first installed it with composer. But when I use the following code in my project:

require 'vendor/autoload.php';
use Carbon\Carbon;
printf("Now: %s", Carbon::now());

I get the following error:

syntax error, unexpected 'use' (T_USE) in ...

So, I tried installing it manually(Copy and past the Carbon class file to my project). Then it worked fine when I tested the following code:

 $now = Carbon::now();
 die($now);

But when I try to run something like this:

$dtKtm = Carbon::createFromFormat('Y-m-d H:i:s', $data['banners'][0]['date_added']); 
echo Carbon::now()->diffForHumans($dtKtm, false);

It gives me " Class 'Translator' not found" error.

Can anyone help me fix this.

回答1:

Carbon Date Time library usage with CodeIgniter

CodeIgniter App setup:

First let me give you an introduction about my CodeIgniter project setup on the localhost is as follows:

/
|- gheapp
|    |- application
|    |- system
|    L- vendor
|    |     |-bin
|    |     |-composer
|    |     |-nesbot/carbon
|    |     |-symfony
|    |
|    |----- composer.json
|    L----- composer.lock
|
|- public_html
|    |- .htaccess
|    L- index.php

And in the index.php I have set up the following paths to the system and the application:

$system_path = '../gheapp/system';
$application_folder = '../gheapp/application';

Note 1: by doing so, our application source code becomes hidden to the public at first.
Note 2: For more nitty-gritty about my CodeIgniter setup please follow the following StackOverflow Answer of mine

Step 1: how do I fetch the Carbon package.

Using Composer I fetched the Cabron package to my CodeIgniter App. My composer.json looks like following (it's simplified for your ease).

{
  "require": {
    "nesbot/carbon": "^1.22"
  }
}

After you run composer command composer install it creates the vendor folder within your CI app root and puts the Carbon package as shown above in the folder structure.

Step 2: Autoload Composer downloaded Packages:

In my index.php before the line at the bottom

require_once BASEPATH.'core/CodeIgniter.php';

I have put the following two lines:

$composer_vendor_path = '../gheapp/vendor';
require_once $composer_vendor_path.'/autoload.php';

So now my CodeIgniter app knows how and where to load the composer installed Packages.

Step 3: how do I use the Carbon package within my controller:

Within any method function of my controller (or model) I can use Carbon as follows:

    $date = Carbon\Carbon::today();
    echo $date;   // output:  2017-01-21 00:00:00
    echo '<br/>'.$date->diffForHumans();  // output: 7 hours ago

For further details about using Carbon please visit the following link: Carbon from nesBot

I hope my answer will be useful/helpful to somebody else out there in the future! :-)

回答2:

You need to autoload the vendor folder in your bootstrap (In the index.php file before the line at the bottom require_once BASEPATH.'core/CodeIgniter.php';).

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

The you need to import the libraries namespace in your model / controller (wherever you are using Carbon).

use Carbon\Carbon;

Only then can you use the library.

回答3:

the easiest way that i found is:

1. install carbon using:

   • composer require nesbot/carbon

2. open application/config/config.php and change:

   • $config['composer_autoload'] = FALSE; or whatever
     to
   • $config['composer_autoload'] = FCPATH . '/vendor/autoload.php';

3. call whatever carbon function in your controller:

   • $data['carbondate'] = Carbon\Carbon::now();