thank you for your reply.
I tried the code but I will not improve it.
If you display a page with an embedded iframe, it redirects to the url of the iframe immediately after it is displayed, and the entire page becomes a redirected page.
Thank you for your reply.
Excerpts can not be displayed exactly as it was last time.
Whatever you write in post-loop.php will not be reflected.
Furthermore, even if you write anything, header.php, index.php will not change anything when you actually see it.
Could you tell me in detail how to write it?
