Today I was adding a live-reload script to a WordPress site, so that I could refresh the page on the fly with Grunt. I only wanted to register said script on my local however. This was what I came up with.


if (in_array($_SERVER['REMOTE_ADDR'], array('', '::1'))) {
    wp_register_script('livereload', 'http://localhost:35729/livereload.js?snipver=1', null, false, true);

What’s happening here is I’m grabbing the remote address from the $_SERVER global variable provided in PHP. This will return the IP address from which the user is viewing the current page.

Since localhost maps to either or ::1, depending on the Internet Protocol version, I’ll check the current IP address against an array of both. If either matches, then we’ll load the javascript file.