Search Engine Regex

[FidoDifo]

I am doing this search engine...
Can I use regex to match word that is in the last/last few lines of the article,
and show up that line of it, with the matched/searched word being highlighted.
I already did it by highlighting the matched/searched word, but if the searched word is in the
last/last few lines of the article, it will not showed up that line...
Its like Google, but of course google is more complex,
I was thinking can it be done by juz using regex??

$s = $search;
$row[title]=preg_replace("/($s)/i","<font class=search>\1</font>",$row[title]);
$row[body]=preg_replace("/($_s)/i","<font class=search>\1</font>",$row[body]);

Can anyone help me with this??
Thanx!!!

[Weedpacket]

You could just highlight all the occurrences in the text but only display the first few lines, of course.

Or you could break the body into an array of lines, do matches on the first few lines' worth, and then join it back into a string.