How to specify path to save file in cron?

Question

Task Schedulers

Good day, I have a php script. Which requests a token from the server and writes to a file.

I added this script to Cron, but cron saves the created file not in the directory where the script was run, but 3 directories above.
Example (see below)
/home/admin/web/*********/public_html/save.txt <- I need
/home/admin/save.txt here <- and it saves here
How can I specify in cron, the path to save this file?