FizzBuzz loader

fizzbuzz-loader.php

<?php

trait Fizz { function __toString() { return "Fizz"; } }
trait Buzz { function __toString() { return "Buzz"; } }
trait FizzBuzz { function __toString() { return "FizzBuzz"; } }
trait N { function __toString() { return ltrim(__CLASS__, @_); } }

spl_autoload_register(function ($class) {
    $n = ltrim($class, @_);
    $trait = null;
    if ($n % 3 === 0) $trait .= "Fizz";
    if ($n % 5 === 0) $trait .= "Buzz";
    $trait = $trait ?? 'N';

    eval("final class $class { use $trait; }");
});

foreach (range(1, 100) as $n) {
    $class = "_$n";
    echo new $class, PHP_EOL;
}