Better File Editor replaces WordPress' default code editor with the Cloud9 Web-based editor from Ajax.org.
The plugin works for both the plugin and theme source code editors.
Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.
Here are some key features of "Better File Editor":
· Add line numbers
· Source code syntax highlighting
· Collapsible code blocks
· Show/hide gutter
· Show/hide whitespace indicators
· Control font size
· WordPress 2.8 or higher
What's New in This Release: [ read full changelog ]
· Complete rewrite built on Ajax.org Cloud9 Editor, and replacing official plugin and theme editors rather than adding extra stand-alone editor.