Smarter word-wrap in PHP for long words?

I've had a go at the custom function for this smart wordwrap:

function smart_wordwrap($string, $width = 75, $break = "\n") {    // split on problem words over the line length    $pattern = sprintf('/([^ ]{%d,})/', $width);    $output = '';    $words = preg_split($pattern, $string, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);    foreach ($words as $word) {        if (false !== strpos($word, ' ')) {            // normal behaviour, rebuild the string            $output .= $word;        } else {            // work out how many characters would be on the current line            $wrapped = explode($break, wordwrap($output, $width, $break));            $count = $width - (strlen(end($wrapped)) % $width);            // fill the current line and add a break            $output .= substr($word, 0, $count) . $break;            // wrap any remaining characters from the problem word            $output .= wordwrap(substr($word, $count), $width, $break, true);        }    }    // wrap the final output    return wordwrap($output, $width, $break);}$string = 'hello! too long here too long here too heeeeeeeeeeeeeereisaverylongword but these words are shorterrrrrrrrrrrrrrrrrrrr';echo smart_wordwrap($string, 11) . "\n";

EDIT: Spotted a couple of caveats. One major caveat with this (and also with the native function) is the lack of multibyte support.

How about

$string = "hello! heeeeeeeeeeeeeeereisaverylongword";$break = 25;echo implode(PHP_EOL, str_split($string, $break));

Which outputs

hello! heeeeeeeeeeeeeeere                                                                                                                                                           isaverylongword

str_split() converts the string to an array of $break size chunks.

implode() joins the array back together as a string using the glue which in this case is an end of line marker (PHP_EOL) although it could as easily be a '<br/>'

This is also a solution (for browsers etc.):

$string = 'hello! heeeeeeeeeeeeeeeeeeeeeereisaverylongword';echo preg_replace('/([^\s]{20})(?=[^\s])/', '$1'.'<wbr>', $string);

It puts a <wbr> at words with 20 or more characters

<wbr> means "word break opportunity" so it only breaks if it has to (dictated by width of element/browser/viewer/other). It's invisible otherwise.

Good for fluid/responsive layout where there is no fixed width. And does not wrap odd like php's wordwrap