Command Line script to upgrade a WordPress Multisite instance

cli-ms-upgrade.php

<?php
/**
 * WordPress Multisite upgrade script
 *
 * IMPORTANT: While a simple safeguard has been added to the script,
 * you'll want to add another layer that prevents this script from 
 * being called via the browser.
 *
 * Usage:
 * 1) Place in the root of your install (or another place, but modify the wp-load.php path to match)
 * 2) Modify the $_SERVER['HTTP_HOST'] variable below
 * 3) > php cli-ms-upgrade.php
 *
 * @author Mo Jangda batmoo@gmail.com
 * @license GPL2
 */

// Modify this based on site domain
$_SERVER['HTTP_HOST'] = 'localhost';

// Script can only be called from command line
if( ! defined( 'STDIN' ) )
	die( 'This script can only be called from the command line.' );

set_time_limit( 0 );
ini_set( 'display_errors', 'off' );
error_reporting(-1);

// Load WordPress Administration Bootstrap
require_once( dirname( __FILE__ ) . '/wp-load.php' );

if ( ! function_exists( 'wp' ) )
	die( 'Couldn\'t load WordPress :(' );

// Kill if we're not running multisite
if ( ! is_multisite() )
	die( __( 'Multisite is not enabled.' ) );

// Add the HTTP Utility class
require_once( ABSPATH . WPINC . '/http.php' );

global $wp_db_version;
update_site_option( 'wpmu_upgrade_site', $wp_db_version );

$upgrade_count = 0;
$n = 0;

do {
	$blogs = $wpdb->get_results( "SELECT * FROM {$wpdb->blogs} WHERE site_id = '{$wpdb->siteid}' AND spam = '0' AND deleted = '0' AND archived = '0' ORDER BY registered DESC LIMIT {$n}, 5", ARRAY_A );
	
	foreach ( (array) $blogs as $details ) {
		$siteurl = get_blog_option( $details['blog_id'], 'siteurl' );
		echo "* $siteurl \n";
		
		// Do the actual upgrade
		$response = wp_remote_get( trailingslashit( $siteurl ) . "wp-admin/upgrade.php?step=upgrade_db", array( 'timeout' => 120, 'httpversion' => '1.1' ) );
		
		// TODO: Option to not die on fail
		if ( is_wp_error( $response ) )
			die( sprintf( __( '** Warning! Problem updating %1$s. Your server may not be able to connect to sites running on it. Error message: <em>%2$s</em>' ), $siteurl, $response->get_error_message() ) );
		
		_e( "** Upgraded! \n\n" );
		
		$upgrade_count++;
		
		do_action( 'after_mu_upgrade', $response );
		do_action( 'wpmu_upgrade_site', $details[ 'blog_id' ] );
	}
	
	$n += 5;
} while ( empty( $blogs ) );

_e( sprintf( "All done! Upgraded %d site(s). \n", $upgrade_count ) );