Re: String manipulation out of the box solution?

On Tue, May 10, 2005 5:58 am, Merlin said: > I am writing an internal full text search engine and do have trouble in > outputting the text in an apropriate way. > > Problem is that if there is more than one word I cant handle the text > cropping. > > For example: > Search term: php germany > Text from database: There is no such great language than php. Amongh those > countries using this language is Germany with a good percentage of users. > Text output should be: > ...language than php. Amongh... language is Germay with a good... > > Similar to the way google does it. I tried it now with a couple of ways > but > failed for most (I tried with strpos and substr). > > Is there a solution out of the box with php, or maybe anybody knows a good > script which does that. This does sound like a standard feature to me. Here's a quickie, untested, and probably with some kind of logic errors, or at least things not quite what you want. $fulltext = "There is no such great language than php. Amongh those countries using this language is Germany with a good percentage of users."; $words = explode(" ", "php germany"); $snippets = ''; while (list(, $word) = each($words)){ if (!stristr($snippets, $word)){ //skip this if we already got the word. $start = strpos($fulltext, $word); if ($start !== false){ $end = $start + strlen($word); $jumpback = strpos(' ', $fulltext, $start - 20); $jumpforward = strpos(' ', $fulltext, $end + 20); $snippet = substr($fulltext, $jumpback, $jumpforward); $snippets .= " $snippet "; } } } reset($words); while (, $word) = each($words)){ $snippets = str_replacei($word, "<b>$word</b>", $snippets); } echo $snippets; To Do: Might wanna store an array of start/end numbers for snippets, then sort by start, then combine those that "overlap" one end to the next start, *THEN* combine those snippets, so you don't have snippets out or order, nor overlapping. Still, I got ya started... -- Like Music? http://l-i-e.com/artists.htm