It is an application package manager for the PHP programming language that provides a standard format for managing dependencies of PHP software. The composer is developed by Nils Adermann and Jordi Boggiano, who continue to lead the project. The composer is easy to use, and installation can be done through the command line.

It can be directly downloaded from

Using the composer can solve the following problems:
  • Resolution of dependency for PHP packages
  • To keep all packages updated
  • The solution is autoloading for PHP packages.
BY Best Interview Question ON 14 Jul 2019