Multi-byte safe wordwrap() function for UTF-8

Question

PHP\'s wordwrap() function doesn\'t work correctly for multi-byte strings like UTF-8.

There are a few examples of mb safe functions in the comments, but with some di

Answer 1

Here is the multibyte wordwrap function i have coded taking inspiration from of others found on the internet.

function mb_wordwrap($long_str, $width = 75, $break = "\n", $cut = false) {
    $long_str = html_entity_decode($long_str, ENT_COMPAT, 'UTF-8');
    $width -= mb_strlen($break);
    if ($cut) {
        $short_str = mb_substr($long_str, 0, $width);
        $short_str = trim($short_str);
    }
    else {
        $short_str = preg_replace('/^(.{1,'.$width.'})(?:\s.*|$)/', '$1', $long_str);
        if (mb_strlen($short_str) > $width) {
            $short_str = mb_substr($short_str, 0, $width);
        }
    }
    if (mb_strlen($long_str) != mb_strlen($short_str)) {
        $short_str .= $break;
    }
    return $short_str;
}

Dont' forget to configure PHP for using UTF-8 with :

ini_set('default_charset', 'UTF-8');
mb_internal_encoding('UTF-8');
mb_regex_encoding('UTF-8');

I hope this will help. Guillaume