Get the filesystem directory path (with trailing slash) for the plugin __FILE__ passed in.

Get the URL directory path (with trailing slash) for the plugin __FILE__ passed in.

Create and modify WordPress roles for WordPress 2.8.

Displays comments for post.

Displays the relational link for the previous post adjacent to the current post.

Prints the styles queue in the HTML head on admin pages.

Prints the scripts that were queued for the footer or too late for the HTML head.

Prints the script queue in the HTML head on admin pages.

Register widget for sidebar with backward compatibility.

Register a widget