Php is a programmable area, people can take php projects and use them in their php software.
It's not tutorial.Check this please
https://utopian.io/utopian-io/@justyy/adding-ipify-api-support-in-chrome-extension-what-is-my-ip

You can check rules ;

Development Rules
Only merged Pull Requests will be accepted or Open Source projects you maintain never posted on Utopian before, forks included as long as the fork is not just a mirror of the original one. Proof of work required.
In this category you can only write if you have developed or contributed to the development.
You must provide the links to the branches/forks/gists/pull requests.
If your username on Github does not correspond to the Utopian username you must provide proof you are the owner by providing a screenshot of the logged in session in Github.
Images, screenshots, links and examples are not necessary but preferred.
Never write about code contributions you have already shared before.