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.

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 | 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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