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authorDerek Jones <derek.jones@ellislab.com>2011-10-05 20:34:52 +0200
committerDerek Jones <derek.jones@ellislab.com>2011-10-05 20:34:52 +0200
commit8ede1a2ecbb62577afd32996956c5feaf7ddf9b6 (patch)
tree2e960ec3b416b477f40bb546371f2d486f4a22f0 /user_guide_src/source/general/cli.rst
parentd1ecd5cd4ae6ab5d37df9fbda14b93977b9e743c (diff)
replacing the old HTML user guide with a Sphinx-managed user guide
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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).
+
+- `What is the CLI? <#what>`_
+- `Why use this method? <#why>`_
+- `How does it work? <#how>`_
+
+What is the CLI?
+================
+
+The command-line interface is a text-based method of interacting with
+computers. For more information, check the `Wikipedia
+article <http://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 for ``$this->input->is_cli_request()``
+- Make interactive "tasks" that can do things like set permissions,
+ prune cache folders, run backups, etc.
+- Integrate with other applications in other languages. For example, a
+ random C++ script could call one command and run code in your models!
+
+Let's try it: Hello World!
+==========================
+
+Let's create a simple controller so you can see it in action. Using your
+text editor, create a file called tools.php, and put the following code
+in it:
+
+<?php class Tools extends CI_Controller { public function message($to =
+'World') { echo "Hello {$to}!".PHP_EOL; } } ?>
+Then save the file to your application/controllers/ folder.
+
+Now normally you would visit the your site using a URL similar to this::
+
+ example.com/index.php/tools/message/to
+
+Instead, we are going to open Terminal in Mac/Lunix or go to Run > "cmd"
+in Windows and navigate to our CodeIgniter project.
+
+ $ cd /path/to/project;
+ $ php index.php tools message
+
+If you did it right, you should see Hello World!.
+
+ $ 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.