<?php

$txt="dssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss  dfds dsfa as df sd fsadf sad   sdaf sad fsadfsadfsd sadf httpsdffffffffffffffffsddddddddddddddddddddddddddddddddddd .comsdsssssssssssssssssssssssssssssssssssssss";
echo chunk_split($txt,10);
echo preg_replace("/([a-zA-Z0-9]{30,})/i",csplit("$1"),$txt);

function csplit($str)
{
return chunk_split($str,10);
}

?>

i expected to be splitted the words with more than 30 chars... but doesn't work.