Insert spaces into long Multibyte/UTF-8 string

I need function written on PHP which insert spaces if string is too long. U must remember that string can be UTF-8/Multibyte encoded. This function need to keep formatting (do not calculate carriage return). There are similar functions but they don't work properly - change chars before space or insert tab instead of space etc. Here is this function taken from [login to view URL] which has such bugs. <?php function utf8_wordwrap($str,$len,$what){ $from=0; $str_length = preg_match_all('/[\x00-\x7F\xC0-\xFD]/', $str, $var_empty); $while_what = $str_length / $len; while($i <= round($while_what)){ $string = preg_replace('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$from.'}'. '((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$len.'}).*#s', '$1',$str); $total .= $string.$what; $from = $from+$len; $i++; } return $total; } ?> So if u want - u can cange this one or write new. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform PHP, Linux/Unix