How to reverse a Unicode string

Question

It was hinted in a comment to an answer to this question that PHP can not reverse Unicode strings.

As for Unicode, it works in PHP because most app

Answer 1

The answer

function mb_strrev($text, $encoding = null)
{
    $funcParams = array($text);
    if ($encoding !== null)
        $funcParams[] = $encoding;
    $length = call_user_func_array('mb_strlen', $funcParams);

    $output = '';
    $funcParams = array($text, $length, 1);
    if ($encoding !== null)
        $funcParams[] = $encoding;
    while ($funcParams[1]--) {
         $output .= call_user_func_array('mb_substr', $funcParams);
    }
    return $output;
}