Can't apply json_decode to inputs...?

Erin

My app has a simple messaging feature. It turns out that if a user puts line breaks in their message, I get the error "Error parsing JSON: Control character error, possibly incorrectly encoded"

I tried replacing "\n" with " " before decoding, but still got the error. In "Run & Debug", I rewrote the message totally from scratch in case there were invisible control characters (apparently that's a thing?). It still failed as soon as I put in "\n".

I'm successfully decoding "\n" in other parts of the app. Why does it give me trouble when trying to apply that to an input?

Erin

For anyone encountering the same issue:

1. I saved the input as a new variable (sms_body)with the json_encode filter.
2. For a postscript I needed to add to the end, I saved the text in a variable like this: "\n\nReply STOP" (include the quotation marks in the text!).
3. In my API request, I put in the new variable with the json_encode filter, then concatted the postscript with its own json_decode: