There is a code:
<?php echo "<table border='0' cellpadding='2' cellspacing='0' width='100%'>\n"; echo "<tr>\n"; echo "<td width='100%' bgcolor='".$TitleBackgroundColour."'><font face='Arial' size='".$TitleSize."'>Error</font></td>\n"; echo "</tr>\n"; echo "</table>\n"; echo "<p><font face='Arial' size='".$NormalTextSize."'>".$msg."</font>\n"; echo "<font face='Arial' size='".$NormalTextSize."'><br>Click <A HREF=JavaScript:history.back()>here</a> to return to the previous page or click the Back button on your browser.</font></p>\n"; echo "<hr>\n"; ?>
What does \ n mean?