Código PHP:
<?php
for ($i = 0; $i < count($last); $i++) {
?>
<a href="<?php echo $phpbb_root_path; ?>viewtopic.php?t=<?php echo $last[$i]['topic_id']; ?>">
<?php
last_corta[$i]['topic_title'] = substr($last[$i]['topic_title'],"0","15");
last_corta[$i]['topic_title'] = "...";
echo last_corta[$i]['topic_title'];
?>
por <a href="<?php echo $phpbb_root_path; ?>profile.php?mode=viewprofile&u=<?php echo $last[$i]['user_id']; ?>"><?php echo $last[$i]['username']; ?></a>
<?php
}
?>