### Basic Carbon Usage with Composer

Source: https://github.com/briannesbitt/carbon/blob/master/readme.md

Include the Composer autoloader and use the Carbon class to get the current date and time. This example assumes Composer installation.

```php
<?php
require 'vendor/autoload.php';

use Carbon\Carbon;

printf("Now: %s", Carbon::now());
```

--------------------------------

### Install Carbon with Composer

Source: https://github.com/briannesbitt/carbon/blob/master/readme.md

Use Composer to add Carbon as a project dependency. This is the recommended installation method.

```bash
$ composer require nesbot/carbon
```

--------------------------------

### Create and Format Carbon Instances

Source: https://github.com/briannesbitt/carbon/blob/master/readme.md

Demonstrates creating Carbon instances for the current time, specific times, and performing basic formatting. Includes examples for setting test times and performing comparisons.

```php
<?php

use Carbon\Carbon;

printf("Right now is %s", Carbon::now()->toDateTimeString());
printf("Right now in Vancouver is %s", Carbon::now('America/Vancouver'));  //implicit __toString()
$tomorrow = Carbon::now()->addDay();
$lastWeek = Carbon::now()->subWeek();

$officialDate = Carbon::now()->toRfc2822String();

$howOldAmI = Carbon::createFromDate(1975, 5, 21)->age;

$noonTodayLondonTime = Carbon::createFromTime(12, 0, 0, 'Europe/London');

$internetWillBlowUpOn = Carbon::create(2038, 01, 19, 3, 14, 7, 'GMT');

// Don't really want this to happen so mock now
Carbon::setTestNow(Carbon::createFromDate(2000, 1, 1));

// comparisons are always done in UTC
if (Carbon::now()->gte($internetWillBlowUpOn)) {
    die();
}

// Phew! Return to normal behaviour
Carbon::setTestNow();

if (Carbon::now()->isWeekend()) {
    echo 'Party!';
}
// Over 200 languages (and over 500 regional variants) supported:
echo Carbon::now()->subMinutes(2)->diffForHumans(); // '2 minutes ago'
echo Carbon::now()->subMinutes(2)->locale('zh_CN')->diffForHumans(); // '2分钟前'
echo Carbon::parse('2019-07-23 14:51')->isoFormat('LLLL'); // 'Tuesday, July 23, 2019 2:51 PM'
echo Carbon::parse('2019-07-23 14:51')->locale('fr_FR')->isoFormat('LLLL'); // 'mardi 23 juillet 2019 14:51'

// ... but also does 'from now', 'after' and 'before'
// rolling up to seconds, minutes, hours, days, months, years

$daysSinceEpoch = Carbon::createFromTimestamp(0)->diffInDays(); // something such as:
                                                                // 19817.6771
$daysUntilInternetBlowUp = $internetWillBlowUpOn->diffInDays(); // Negative value since it's in the future:
                                                                // -5037.4560

// Without parameter, difference is calculated from now, but doing $a->diff($b)
// it will count time from $a to $b.
Carbon::createFromTimestamp(0)->diffInDays($internetWillBlowUpOn); // 24855.1348

```

--------------------------------

### Update Dependencies

Source: https://github.com/briannesbitt/carbon/blob/master/contributing.md

Update project dependencies using Composer. Use the local phar or the globally installed composer.

```shell
./composer.phar update
```

```shell
composer update
```

--------------------------------

### Run Unit Tests

Source: https://github.com/briannesbitt/carbon/blob/master/contributing.md

Execute the project's unit tests using PHPUnit to ensure code quality and stability.

```shell
./vendor/bin/phpunit
```

--------------------------------

### Basic Carbon Usage without Composer

Source: https://github.com/briannesbitt/carbon/blob/master/readme.md

Manually include the Carbon autoloader after downloading the library. This method is suitable if Composer is not used.

```php
<?php
require 'path-to-Carbon-directory/autoload.php';

use Carbon\Carbon;

printf("Now: %s", Carbon::now());
```

--------------------------------

### Clone Carbon Repository

Source: https://github.com/briannesbitt/carbon/blob/master/contributing.md

Clone the Carbon project from GitHub and set up the upstream remote for future synchronization.

```shell
git clone https://github.com/<username>/carbon.git
cd Carbon
git remote add upstream https://github.com/CarbonPHP/carbon.git
```

--------------------------------

### Sync Local Repository with Upstream

Source: https://github.com/briannesbitt/carbon/blob/master/contributing.md

Fetch changes from the upstream remote and rebase your local branch to keep it up-to-date.

```shell
git fetch origin
git rebase origin/master
```

--------------------------------

### Configure Git User Information

Source: https://github.com/briannesbitt/carbon/blob/master/contributing.md

Set your global Git user name and email. Remove the --global flag to set it only for the current repository.

```shell
git config --global user.name "Your Name"
git config --global user.email "your.email.address@example.com"
```

--------------------------------

### Commit Changes

Source: https://github.com/briannesbitt/carbon/blob/master/contributing.md

Stage all changes and commit them with a descriptive message. For bug fixes, reference the issue number.

```shell
git add --all
git commit -m "The commit message log"
```

```shell
git commit -m "#21 Fix this or that"
```

--------------------------------

### Create a New Feature Branch

Source: https://github.com/briannesbitt/carbon/blob/master/contributing.md

Create a new branch for your development work, based on the master branch.

```shell
git checkout -b my-feature-branch -t origin/master
```

--------------------------------

### Composer package.json configuration

Source: https://github.com/briannesbitt/carbon/blob/master/readme.md

Specify the Carbon version in your Composer JSON file. Ensure you are using a compatible version, such as '^3'.

```json
{
    "require": {
        "nesbot/carbon": "^3"
    }
}
```

--------------------------------

### Push Changes to Fork

Source: https://github.com/briannesbitt/carbon/blob/master/contributing.md

Push your local feature branch to your remote GitHub fork to prepare for a pull request.

```shell
git push origin my-feature-branch
```

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