On a WordPress page I use only a shortcode with the following PHP code with inserted HTML:

Code mit PHP und HTML

The code is running correctly. When I insert the two line (see picture) I get a 404 message. The URL is shown correctly. When I click on the Edit page the page which should be invoked by the action is shown.

I have similar effects with other pages? What do I make wrong???

Read more here: Getting a 404 using a php / HTML shrotcode


Solution:

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