I want to make a call to/include a PHP script which would force a re-direct to another page. (The other page will contain a captcha and will re-direct back if entered correctly).
I need the most reliable PHP redirect code possible, so no one can escape/avoid it. If the redirect fails then the rest of the page will be shown and that’s not what I want.
No.
A redirection can be avoided if someone is actively seeking to avoid it or is using a browser which doesn’t handle it correctly.