PHP 5.6 In A Nutshell

Catchable fatal error: Argument 1 passed to ***() must be an instance of string, string given, called in ***

<?php
function 🗲(string $who) {
 echo 'hello ', $who, '!';
}

🗲('ne-a-r');

https://3v4l.org/m62Tb
https://stackoverflow.com/q/4103480