Category "plaintext"

Is there a special character that cannot be typed or copied by user, but can be inserted/read by code into/from text?

I need to have a temporary delimiter, inserted server-side, that cannot possibly exist in content created by user. The purpose for this is to have prepared con

Is there a special character that cannot be typed or copied by user, but can be inserted/read by code into/from text?

I need to have a temporary delimiter, inserted server-side, that cannot possibly exist in content created by user. The purpose for this is to have prepared con