PHP is one of the most widely used programming languages for building web applications. Sometimes, when building complex web applications, the developers may found it difficult to manage all the application dependencies as well as the required libraries for the same application. However, PHP will not be such widely used if there is not an appropriate solution for this problem. Like in many programming languages, in PHP one can manage the application dependencies and the required libraries by using Composer. Today we will show you how to install Composer on a Linux VPS.