- strpos: documentation ( source)
- strtok: documentation ( source)
- preg_replace: documentation ( source)
<?php
$poor_geek = "H A R R Y P O T T E R";
$voldemort = "Lord Voldemort";
function avada_kedavra(string $fullname): string
{
if (strpos($fullname, " ") !== false)
$fullname = preg_replace("{ (?! )}", "", $fullname);
return strtok($fullname, " ");
}
echo avada_kedavra($poor_geek), " is dead\n";
echo avada_kedavra($voldemort), " cannot die\n";