What is the best way to split a string into an array of Unicode characters in PHP?

Question

In PHP, what is the best way to split a string into an array of Unicode characters? If the input is not necessarily UTF-8?

I want to know whether the set of Unicode

Answer 1

the best way for split with length: I just changed laravel str_limit() function:

    public static function split_text($text, $limit = 100, $end = '')
{
    $width=mb_strwidth($text, 'UTF-8');
    if ($width <= $limit) {
        return $text;
    }
    $res=[];
    for($i=0;$i<=$width;$i=$i+$limit){
        $res[]=rtrim(mb_strimwidth($text, $i, $limit, '', 'UTF-8')).$end;
    }
     return $res;
}