<?php
function trimtext ($text,$max) {
  if (strlen($text) <= $max) {
    return $text;
  }
 
  $text2 = "<abbr title=".$text.">";
  $text2 = substr($text,0,($max - 3));
  $text2 .= "...</abbr>";
  return $text2;
 }
 
$text = '123456789';
echo trimtext($text,6);
?>