I am unable to edit files in the ditor in WP and via FTP because Unable to communicate back with site to check for fatal errors, so the PHP change was reverted. You will need to upload your PHP file change by some other means, such as by using SFTP.
I'm just wondering if there is another way to add the featured image to the front of the post like a standard blog post would… without having any kind of back end access.
I've searched the depths of the plugins repository at wordpress.org
Any advice?