<?php

// your code goes here

function mb_str_pad($input, $pad_length, $pad_string = ' ', $pad_type =    STR_PAD_RIGHT, $encoding = "UTF-8") {
$diff = strlen($input) - mb_strlen($input, $encoding);
return substr(str_pad($input, $pad_length + $diff, $pad_string, $pad_type),0,15);
}

echo mb_str_pad("ESPERANÇAaaaaaaaaaaa", 15, "#");