Error accessing a script generated by PHP.

Error accessing a script generated by PHP.
How can a file be removed from the upload field in HTML by the user? Two solutions.
Create table of contents automatically with “Easy Table of Contents“.
Activate, deactivate and remove Apache websites and configurations. This is how it works.
Another plugin for sending mail in WordPress, which I personally like better than “WP Mail SMTP”.
How do I change the mail dispatch from WordPress to SMTP dispatch?
Reading out all blog articles with link and PHP. Without WordPress functions.
Non-selectable default text for dropdown elements in HTML.
Code snippet for generating hints in HTML.
How can I round the corners of an object in Inkscape?