Load WordPress via another PHP script

gistfile1.aw

<?php
$site_name   = 'news_blog';    // e.g. "example.com/news_blog"
$site_domain = 'example.com';

/**
 * Construct a fake $_SERVER global to get WordPress to load a specific site.
 * This avoids alot of messing about with switch_to_blog() and all its pitfalls.
 */
$_SERVER = array(
	'HTTP_HOST'      => $site_domain,
	'REQUEST_METHOD' => 'GET',
	'REQUEST_URI'    => "/{$site_name}/",
	'SERVER_NAME'    => $site_domain,
);

// Remove all our bespoke variables as they'll be in scope as globals and could affect WordPress
unset( $site_name, $site_domain );

// Pretend that we're executing an AJAX process. This should help WordPress not load all of the things.
define( 'DOING_AJAX', true );

// Stop WordPress doing any of its normal output handling.
define( 'WP_USE_THEMES', false );

// Load WordPress - intentionally using an absolute URL due to issues with relative paths on the CLI.
require( '/opt/wp/blogs/wp-load.php' );

// Do normal WordPress stuff here
?>

Great. Very helpful!