Sometimes you need to create a template file for your child theme and you want to do this quickly while in the wordpress theme editor.

There is a simple function that creates a file on your server. You can place this function in your header.php or functions.php file using the wordpress editor and refresh a page on your site for it to run.

<?php touch(‘wp-content/themes/YOUR_THEME_DIR/FILE_NAME.php’);?>

You must know your theme folder already to use this properly and you can create any file type with this. It doesn’t have to be php files.

I’ve used this to quickly create an attachment.php template file for a child theme that required a customization of gallery links to attachments.

Found this link helpful:

https://www.webmechanix.com/how-to-create-a-new-theme-file-in-wordpress-without-ftp-access/