VS Code: No PHP executable is set

I am busy with a Udemy course about WordPress. The course uses VS Code as text editor and I love it, but keep getting a "No PHP executable is set error". PHP was loaded as part of the Local-by-Flywheel software, so I do not know where to find the executable. What command can I use in the terminal to find the path of this file (I don’t even know what the PHP executable is called.
Your help will be much appreciated.