What is the main difference between 'include' and 'require'?

Question

The include and require statements allow for the insertion of the content of one PHP file into another PHP file, before the server executes it.

Answer 1

When the desired file doesn't exist, or unreadable `include` gives warning. On the other hand, `require` will produce error and stops script execution.

Quoted & summarized from:
https://stackoverflow.com/questions/3633900/difference-between-include-and-require-in-php

Answer 2

if failure happen require will produce an error
whereas import only give a warning