Make a slug for an earl in PHP

slug.php

<?php

function slug(string $string, int $width = 100) : string
{

    $string = Normalizer::normalize($string);
    $string = trim(preg_replace('/[^\pL\p{Nd}]+/u', ' ', $string));
    $string = strtr($string, ' ', '-');

    return mb_strimwidth($string, 0, $width, '', 'UTF-8');
}