Custom Function to redirect singular post if specific meta field is empty

Technically, this code looks like it is accomplishing what you are trying to do, and I don’t see any glaring holes.

But, do you really intend on redirecting people away from your site when they just clicked to view someone’s bio? That sounds very confusing to the user and would result in a poor user experience, I think.

Regarding security, who is entering the data into the ecpt_website field? You or users? If users, I would definitely avoid that.

I assume these are offsite links, but if you are using internal links, you should use wp_safe_redirect() instead which is meant for internal linking.

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