asistencia/include/func_string.php

<?php
namespace utils;
function simpify_string(string $string): string
{
    $string = mb_strtolower($string);
    
    $string_without_accents = str_replace(array('á', 'é', 'í', 'ó', 'ú', 'ñ'), array('a', 'e', 'i', 'o', 'u', 'n'), $string);
    $string_without_spaces = str_replace(' ', '', $string_without_accents);
    return $string_without_spaces;
}