PHP CLI Input: Process keys pressed by the user in the shell

This class can process keys pressed by the user in the shell.

It can read the characters typed by the user in a command line shell ANSI terminal and return what the user entered.

The class can invoke given callback functions when the user presses certain keys like cursor, escape, return, tab, backspace, delete, or any other character.

The callback functions can perform actions that alter the text entered by the user like for instance performing auto-completion.