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Posted by Rory Browne on 06/08/05 16:51
On 6/8/05, John Nichel <john@kegworks.com> wrote:
> Rory Browne wrote:
> > On 6/8/05, David Duong <david@forizon.org> wrote:
> >
> >>Sebastian wrote:
> >>
> >>>i'm looking for a function that can highlight certain search terms in a
> >>>string. anyone have something already made that i can plugin to my
> >>>exisiting code?
> >>>
> >>>I found a couple but they do not work very well.. some break html code
> >>>if the string contains the keywords in the html.
> >>>
> >>>thanks.
> >>
> >>You can use str_replace to "highlight" the search terms.
> >>
> >>For example, you could use the following code for each search term (this
> >>function also accepts arrays, see http://php.net/str_replace):
> >>
> >>str_replace ($search_term, "<b>$search_term</b>", $body_text);
> >
> >
> > Bad idea. Very bad idea.
> >
> > for example ( using bold to highlight ):
> > <?pseudo_code
> >
> > $html = "<html><body>I want to hightlight the word body in this text.
> > </body></html>";
> > $search = "body";
> >
> > $output = str_replace($search, "<b>$search</b>", $html);
> > // $output == "<html><<b>body</b>>I want to hightlight the word
> > <b>body</b> in this text. </<b>body</b>></html>";
> >
> > // see what I mean?
> > ?>
>
> Good catch Rory. A regex replace would work better here.
>
> $search = "body";
> $find = "/\b" . $search . "\b/";
> preg_replace ( $find, "<b>" . $search . "</b>", $html );
I don't think so. If I'm reading your code correctly you still have
the same problem, as I outlined above. There is no simple solution to
this. It either involves advanced regex(more advanced than my
understanding of it), or a proper parser.
<?pseudo_code
function highlight_html_string($needle, $haystack);
$retval = "";
$i = 0;
while($i < strlen($haystack)){
$str = get_text_between_certain_point_and_first_instance_of_<($i);
$str = preg_replace(what john said above);
$str .= get_tag_text($i);
$retval .= $str;
$i += strlen($str);
}
return $retval;
?>
>
> --
> John C. Nichel
> ÜberGeek
> KegWorks.com
> 716.856.9675
> john@kegworks.com
>
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