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###################
Running via the CLI
###################
As well as calling an applications :doc:`Controllers <./controllers>`
via the URL in a browser they can also be loaded via the command-line
interface (CLI).
.. contents:: Page Contents
What is the CLI?
================
The command-line interface is a text-based method of interacting with
computers. For more information, check the `Wikipedia
article <https://en.wikipedia.org/wiki/Command-line_interface>`_.
Why run via the command-line?
=============================
There are many reasons for running CodeIgniter from the command-line,
but they are not always obvious.
- Run your cron-jobs without needing to use *wget* or *curl*
- Make your cron-jobs inaccessible from being loaded in the URL by
checking the return value of :php:func:`is_cli()`.
- Make interactive "tasks" that can do things like set permissions,
prune cache folders, run backups, etc.
- Integrate with other applications in other languages. For example, a
random C++ script could call one command and run code in your models!
Let's try it: Hello World!
==========================
Let's create a simple controller so you can see it in action. Using your
text editor, create a file called Tools.php, and put the following code
in it::
<?php
class Tools extends CI_Controller {
public function message($to = 'World')
{
echo "Hello {$to}!".PHP_EOL;
}
}
Then save the file to your *application/controllers/* folder.
Now normally you would visit the site using a URL similar to this::
example.com/index.php/tools/message/to
Instead, we are going to open the terminal in Mac/Linux or go to Run > "cmd"
in Windows and navigate to our CodeIgniter project.
.. code-block:: bash
$ cd /path/to/project;
$ php index.php tools message
If you did it right, you should see *Hello World!* printed.
.. code-block:: bash
$ php index.php tools message "John Smith"
Here we are passing it a argument in the same way that URL parameters
work. "John Smith" is passed as a argument and output is::
Hello John Smith!
That's it!
==========
That, in a nutshell, is all there is to know about controllers on the
command line. Remember that this is just a normal controller, so routing
and ``_remap()`` works fine.
|
