Composer deals with “packages” or libraries and it manages those packages or libraries on a per-project basis, installing them in a directory (e.g. vendor) inside a project. It also checks that other packages depend on a particular project and install them for you using the appropriate versions as per the project requirements.
To install and run composer and php-cli, the php-mbstring package is required to provide the functions for the library that we are using. The composer uses git to download project dependencies and unzip to extract the zipped package.
So run this command to install- $ sudo apt-get install curl php-cli php-mbstring git unzip.
To install composer globally
The following steps are required to install composer:
sudo php composer-setup.php –install-dir=/usr/local/bin/–filename=composer
After downloading the output will look like this:
All settings correct for using Composer
Composer.json file will be automatically generated during this process.
If you want to include the dependency in the composer.json file then you must run the composer to install the package.
For example:- To install the php-amqplib using composer run-
composer require php-amqplib/php-amqplib
For Windows OS download and run Composer-Setup.exe to install the latest composer version and then set up your PATH so that you can call it from any directory in your command line.
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