Question

This is just a curiosity question that I didn’t know how to search via google.

Some functions are like this:

function foo()
{
    $bar = 'Hello World';

    return;
}

What is retun; going to return? This is kinda ridiculous.

Answer 1

It does return null. If return is called without any variable or value return will return null.

A note from PHP manual page

If no parameter is supplied, then the parentheses must be omitted and
NULL will be returned. Calling return() with parentheses but with no
arguments will result in a parse error.