Re: Re: string highlight

Rory Browne wrote:

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

John is using \b in his regexp to denote a word boundary - I don't believe < counts as a boundary char therefore niether '<body>' or '<body bla="bla">' would be preg_replace()'d

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 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php