A plugin that modifies the `admin_email` and `blogname` and `blog_public` options for staging sites.

staging-tweaks.php

<?php
/**
 * Plugin Name: Staging Option Tweaks
 * Plugin URI: http://www.josheaton.org/
 * Description: Checks the health of your WordPress install
 * Author: Josh Eaton
 * Version: 0.1
 * Author URI: http://www.josheaton.org/
 *
 * A plugin that modifies the `admin_email` and `blogname` and `blog_public` options for staging sites.
 * Typically used as a mu-plugin so I can pull down a production DB and automatically override certain values with Staging values and I don't have to remember to manually change them each time.
 * 
 * The core option filters:
 * 
 * `option_{option_name}`: Filter that runs on the option value after it has been retrieved and before it's returned.
 * `pre_option_{option_name}`: Filter that runs before getting the option from the DB (it 'short-circuits' the get_option call to allow plugins to override it)
 * 
 * Both are in `wp-includes/option.php` starting on line 40
 */

/**
 * Override admin email
 *
 * @param string $email
 * @return string
 */
function jje_admin_email( $email ) {
  return 'josh@josheaton.org';
}
add_filter( 'pre_option_admin_email', 'jje_admin_email' );

/**
 * Override site name
 *
 * @param string $email
 * @return string
 */
function jje_site_name( $email ) {
	return 'Staging Site Name';
}
add_filter( 'pre_option_blogname', 'jje_site_name' );

add_filter( 'pre_option_blog_public', '__return_zero' ); // Force blog privacy, robots no-follow metatag