Masahiro NAKASHIMA

The theme can be changed and displayed to only logged in users.
The visitors of the website see your old theme while you are testing the new one.
Only the administrator of the WordPress site sees the new theme that can now be tested safely.
You can also use this plugin instead of “Theme Test Drive” plugin.

WP Theme Test

I have xdebug installed. There are two big Notices.

Threw two big PHP notices

The theme can be changed and displayed to only logged in users.

MMDeveloper

A wordpress plugin that lets you search for text within your templates.
Built by The Marketing Mix Perth: https://www.marketingmix.com.au

Search My Theme

I had to fix an issue of broken image paths on a website that I had not developed. The other developers were using an ip-based image path, which broke when the site's IP changed. This plugin let me search for the IP and find where it was being referenced to in the files. It also let me search for a CSS selector. Fantastic plugin, will probably use again!

WP Theme Test vs Search My Theme