gistfile1.txt

<?php 

/*
Include wordpress core
 */
require_once('wp_load.php');

/* Validate a url */
function validate_url($url)
{
  if( filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_QUERY_REQUIRED ) )
	{
		return true;
	}
	else
	{
		return false;
	}
}

if(count($argv) > 1)
{

	if( $argv[1] && !empty($argv[1]) )
	{	

		/* Validate the url */
		if( validate_url($argv[1]) )
		{

			/* Update the WP default options */
			update_option('siteurl', $argv[1]);
			update_option('home', $argv[1]);

			/* If multisite is enabled also update */
			if( is_multisite() )
			{

				/* Fetch a list of all the blogs listed */
				$blog_list = get_blog_list( 0, 'all' );
				if( count($blog_list) )
				{
					foreach($blog_list as $blog)
					{
						update_blog_option($blog['id'], 'domain', $argv[1]);
					}
				}
			}

			/* Return ok */
			fwrite(STDOUT, "OK!");

		}

	}

}

exit(0);

?>