For a WordPress server, you’ll want to ensure that your `sms_log.txt` file is writable by the process running your server (typically PHP under a web server like Apache or Nginx). You don’t necessarily need to make the file writable by everyone—just the web server user.
A good approach would be:
1. Change the ownership of the file to the web server user (e.g., `www-data` for Apache/Nginx in many systems):
“`bash
sudo chown www-data:www-data sms_log.txt
“`
2. Set the file permissions to **`644`** or **`664`**:
– `644`: Only the owner can write, others can only read.
– `664`: Both the owner and group can write, others can only read.
“`bash
chmod 664 sms_log.txt
“`
This allows the web server to write to the file while keeping it secure from unauthorized changes.
If you’re still having issues, you might need to verify that your PHP script has the correct write access. Let me know if you’d like help debugging this further!