I have rewritten more-or-less the same tool, 100KLOC, in Rust and PHP. I can't tell you about Python or Node.js

Use PHP if

- you're in a hurry and you already either know PHP, or the script is going to call other PHP code you've written

- execution speed is not important (ditto for Python and Node)

If neither of the above is true, give Rust a whirl.