How to test a PHP script?

Question

PHP

There is such an old and rather well-known script https://phpbl.ru/php/instagram-api-avtomaticheskij... I run
it on localhost in order to post a picture on Instagram.
No errors, no warnings, no pictures in Insta.
How to properly test this script?
If anyone has a couple of minutes, a square picture and an Instagram account, please check the script for yourself.
Does anyone have other working scripts for posting on Insta?
Thank you.

Answer 1

Run xDebug, set breakpoints, see what happens in the script during execution.
Most likely, the instagram server does not give anything.

Answer 2

The script is already a year old, and the API tends to change.
Moreover, I just compared the code with the documentation, and it seems that it has changed so much in a year.
Just check what insta returns. Most likely something like "This API is deprecated and no longer supported, please check out the new version of the API"