Cookies are a mechanism for storing data in the remote browser to monitor or identify users who return to the website. This is precisely the definition given to us on php.net.

Functions in PHP are blocks of code or subalgorithms that can be reused and help solve a specific task. Functions must be defined before they are called or referenced.

The PHP scandir function will return an indexed array of the files and directories within the specified directory path.

Just as on Linux, chown (change owner) in PHP changes the owner of the specified file or directory.

Today we will see what the PHP function chgrp does. In this post, we will deviate a little from what is given on php.net. Why? This is because PHP, in many of its naming conventions, draws from those of Linux, and I believe that a better explanation is to talk about both.