How to Create new Theme in WordpressCreating a new theme in Wordpress
Stage 1: Know your topic directory & filename
This is a short 3-step mail here on how to create or append a new PHP in your WordPress theme folder without having FTP to it. It doesn't have to be a PHP document, you can create any document with this technique. Know the folder where your currently live design is currently located ( and the folder to which you want to attach a new file).
Go to Appearance -> Topics..... You will see the topic that is currently playing (it is the larger one compared to all the others below it). You should also know the name of the filename you want to create, as this will make this much simpler. Do you know the extensions (is it a.html,.php, etc... files type?)... I call this filename_NAME.
Then open header.php and type this at the top of the file: Substitute YOUR_THEME_DIR with the folder where your WordPress theme is located. Next, substitute the name of your desired filename for the name of the filename you want to create. As soon as all this is done, store Header.php and go to the homepage of your website.
Once the homepage is loaded, it creates this new pattern or theme for you. Go quickly back to your theme editors and delete the line with the PHP coding I said you should insert before. - Go to your topic editors (Appearance -> Editor) and update this page.
Now you should see your new filename on the right side. Hopefully this has contributed to your being able to create or append a new PHP or HTML theme/template in your WordPress theme folder.
Work on a new theme for a website while maintaining the old theme.
Got a WordPress.org page. I' m going to use a new design for the website. Now that I have downloaded the templates, they are in the Themes directory. Old design is currently in use. Work on the new pattern and keep the old pattern alive.
As soon as I have finished working on the new topic, I want to do it actively. Use a theme test plug-in to test your design for administrative use only, while all other administrators keep using the old design. See the official WordPress support page for each of these plug-ins.
There is also an articles with more ressources on how to test topics before they are available online. If you are lucky, you can klone your website under a sub-domain (e.g. with the duplicator plugin), work securely on the klon and go back to the site with all changes. Search through other topics or ask your own inquires.