Added section on Command Line Interface

PHP's command line interface is a simple, powerful way to automate common tasks. New PHP programmers often do not take advantage of PHP's CLI capabilities because they only think of PHP scripts as something that must run in the browser over HTTP. A simple, gentle introduction to running PHP scripts from the command line will help raise awareness that you can accomplish powerful, admin-only tasks through simple PHP scripts without having to craft a UI or open it up to the security issues of the web.

_layouts/default.html

@@ -39,6 +39,7 @@
                     <li><a href="#password_hashing_with_bcrypt">Password Hashing with Bcrypt</a></li>
                     <li><a href="#dependency_management">Dependency Management</a></li>
                     <li><a href="#web_application_security">Web Application Security</a></li>
+                    <li><a href="#command_line_interface">Command Line Interface</a></li>
                     <li><a href="#popular_frameworks">Popular Frameworks</a></li>
                     <li><a href="#links_and_resources">Links &amp; Resources</a></li>
                 </ul>