caingougou

<?php
function mb_str_split($str, $split_length) {
    $chars = array();
    $len = mb_strlen($str);
    for ($i = 0; $i < $len; $i+=$split_length ) {
        $chars[] = mb_substr($str, $i, $split_length); // only one char to go to the array
    }
    return $chars;
}