Composer is a dependency manager for the programming language, PHP. It functions as some sort of project manager that helps the programmer manage dependencies that will be used on a project-to-project basis.
First, need to check for any pending system updates,
apt update apt upgrade
Install the required packages.
apt install wget php-cli php-zip unzip
Download the composer installer file.
wget -O composer-setup.php https://getcomposer.org/installer
root@server:~# wget -O composer-setup.php https://getcomposer.org/installer --2021-08-06 18:37:10-- https://getcomposer.org/installer Resolving getcomposer.org (getcomposer.org)... 126.96.36.199, 2001:41d0:302:1100::8:104f Connecting to getcomposer.org (getcomposer.org)|188.8.131.52|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 58460 (57K) [application/octet-stream] Saving to: ‘composer-setup.php’ composer-setup 100% 57.09K --.-KB/s in 0.01s 2021-08-06 18:37:10 (5.34 MB/s) - ‘composer-setup.php’ saved [58460/58460]
To install Composer globally inside the
/usr/local/bin directory by running the following command.
php composer-setup.php --install-dir=/usr/local/bin --filename=composer
root@server:~# php composer-setup.php --install-dir=/usr/local/bin --filename=composer All settings correct for using Composer Downloading... Composer (version 2.1.5) successfully installed to: /usr/local/bin/composer Use it: php /usr/local/bin/composer
If a new Composer version is available, update the package by running the following command.
mkdir ~/my-first-composer-project cd ~/my-first-composer-project
Initialize a new composer.json and install the carbon package by running the following command.
composer require nesbot/carbon
root@server:~/my-first-composer-project# composer require nesbot/carbon Do not run Composer as root/super user! See https://getcomposer.org/root for details Continue as root/super user [yes]? yes Using version ^2.51 for nesbot/carbon ./composer.json has been created Running composer update nesbot/carbon Loading composer repositories with package information Updating dependencies
After the installation is complete, you can see that Composer created two files
composer.lock along with a
root@server:~/my-first-composer-project# ls -l total 28 -rw-r--r-- 1 root root 60 Aug 6 19:43 composer.json -rw-r--r-- 1 root root 18210 Aug 6 19:43 composer.lock drwxr-xr-x 6 root root 4096 Aug 6 19:43 vendor
Create a new file named
testing.php and paste the following content.
<?php require __DIR__ . '/vendor/autoload.php'; use Carbon\Carbon; printf("Now: %s", Carbon::now());
Run the script by running the following command.
root@server:~/my-first-composer-project# php testing.php Now: 2021-08-06 19:49:13
Next, if you want to update the package then you can use the following command.