Recursively encode to UTF-8 a given array

utf8.php

<?php

# Recursively encode to UTF-8 a given array

public function utf8(array $array)
{
    array_walk_recursive($array, function(&$item, $key) {
        if(is_string($item) && ! mb_detect_encoding($item, 'utf-8', true)) {
            $item = utf8_encode($item);
        }
    });

    return $array;
}