私は使用しました、その作品..あなたはこれを試しました...
<?php
$app_title="HIOX INDIA.COM, a leading business web hosting company, is
currently involved in web services, software/application development, web content
development, web hosting, domain registration, internet solutions and web design.";
echo "<br>Before :".$app_title;
$length=100;
if(strlen($app_title) > $length) {
$app_title1 = substr($app_title, 0,strpos($app_title, ' ', $length));}
$app_title2=split ( $app_title1 , $app_title);
echo "<br><br>After1 :".$app_title1;
echo "<br><br>After2 :".$app_title2[1];
?>