This is a filter plugin that uses a 3rd party Javascript module called highlight.js to make your code look like something you'd see in an IDE.

Once activated, you just need to wrap your code in:

<pre><code>code</code></pre>

(You will need to activate html mode in Atto), or wrap your code in triple backticks (like MarkDown) ``` and the javascript will style it. 

The settings allows you to choose which style to use.

Install

1. Unzip
2. Copy contents to /filter/syntaxhighlighter
3. Activate from Manage filters.

Change requests

Since this is a 3rd party plugin, any change requests that relate to the the styles and features of the highlighting should be directed to the plugin author.

Before you ask...

Can I specify which language I'm using?

You don't need to, the plugin detects that itself. However, you can choose the language by adding it after the backticks. e.g.

```lang:php;;
echo "My PHP code";
```

Or, by adding it to the <code> class attribute:

<pre><code class="lang-php">echo "My PHP code";</code></pre>

Can I have line numbering?

No. This isn't a feature of the javascript plugin. And probably isn't going to be implemented.

Can I use some other highlighting plugin?

I might implement the option of using various hightlighting plugins in the future - such as GeSHi. But this suits my needs for now. You're welcome to do a pull request with any adaptions you would like to add.