WordPress Plugin: Show a "Details" link for installed plugins to view information from the WordPress.org plugin directory.

installed-plugin-details.php

<?php
/**
 * Plugin Name: Installed Plugin Details
 * Description: Show a "Details" link for installed plugins to view information from the WordPress.org plugin directory.
 * Version: 1.0.0
 * Author: Blazer Six
 * Author URI: http://www.blazersix.com/
 * License: GPL-2.0+
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 *
 * @package BlazerSix\InstalledPluginDetails
 * @author Brady Vercher <[email protected]>
 * @copyright Copyright (c) 2012, Blazer Six, Inc.
 * @license GPL-2.0+
 */

/**
 * Main plugin class.
 */
class Installed_Plugin_Details {
  /**
	 * Set up the plugin.
	 *
	 * @since 1.0.0
	 */
	public function setup() {
		if ( is_admin() ) {
			// Display the link with the plugin action links.
			add_filter( 'plugin_action_links', array( $this, 'plugin_links' ), 10, 3 );

			// Display the link with the plugin meta.
			add_filter( 'plugin_row_meta', array( $this, 'plugin_links' ), 10, 4 );
		}
	}

	/**
	 * Add a "details" link to open a thickbox popup with information about
	 * the plugin from the public directory.
	 *
	 * @since 1.0.0
	 *
	 * @param array $links List of links.
	 * @param string $plugin_file Relative path to the main plugin file from the plugins directory.
	 * @param array $plugin_data Data from the plugin headers.
	 * @return array
	 */
	public function plugin_links( $links, $plugin_file, $plugin_data ) {
		if ( isset( $plugin_data['PluginURI'] ) && false !== strpos( $plugin_data['PluginURI'], 'http://wordpress.org/extend/plugins/' ) ) {
			$slug = basename( $plugin_data['PluginURI'] );

			$links[] = sprintf( '<a href="%s" class="thickbox" title="%s">%s</a>',
				self_admin_url( 'plugin-install.php?tab=plugin-information&amp;plugin=' . $slug . '&amp;TB_iframe=true&amp;width=600&amp;height=550' ),
				esc_attr( sprintf( __( 'More information about %s' ), $plugin_data['Name'] ) ),
				__( 'Details' )
			);
		}

		return $links;
	}
}

// Initialize the plugin.
$installed_plugin_details = new Installed_Plugin_Details;
$installed_plugin_details->setup();