What is composer in php

Composer in php with example of how to use it in Codeigniter project.

Last night i was studying about composer in php, It works great like npm package.json,
Now time to start your next php application with composer.

What is composer?

Composer is a tool for dependency management in PHP. It allows you to declare the dependent libraries your project needs and it will install them in your project for you.
Form https://getcomposer.org

Now time to taste composer

Create your project directory “MyNewProject”

Now go to your project directory using terminal

$ cd MyNewProject

Now time to install composer command line just type

curl -sS https://getcomposer.org/installer | php

Note: Make sure curl is already installed in your system
Now create composer.json file under your project directory


    "require": {
        "monolog/monolog": "1.2.*"

Finally install dependencies using below command

$ php composer.phar install

This will create a vendor directory in your root folder of your project.
vendor directory have all the libraries which you are going to use in your projects

For Exp: Using below steps you can use composer in your next codeigniter project.
Add autoload.php to your Codeigniter’s index.php before require_once BASEPATH.’core/CodeIgniter.php’;


Another example to install composer with cakephp
If you are going to installing and configure cakephp using composer then your composer.json file will be


    "name": "example-app",
    "require": {
        "cakephp/cakephp": "2.6.*"
    "config": {
        "vendor-dir": "Vendor/"

and install composer

$ php composer.phar install

For more detail you can see official document of cakephp with composer.

Hope this will help you to understand composer in php 🙂

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