Primary source - Getcomposer
Template - No
Download link - Download Composer
Composer is an application-level Package Manager for the PHP programming language that provides a standard format for managing dependencies of PHP software and required libraries. It was developed by Nils Adermann andJordi Boggiano, who continue to manage the project.
Composer is a tool for dependency management in PHP. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you.
In my opinion composer is best package manager and very secure and manages all it task efficiently but one thing I not found in compose is that It has only command line interface and no GUI Interface.
Installation composer on windows
Composer installation Steps ( WAMP )
Step 1 - Download executable from here .
Step 2 - Enable openssl extension in WAMP.
Step 3 - open file E:\wamp\bin\php\php5.3.5\php.ini and
remove ; before extension=php_openssl.dll save.
Step 4 - Now again restart WAMP server.
Step 5 - Now Run Composer.exe