I've got this regular expression which removes common words($commonWords) from a string($input) an I would like to tweak it so that it ignores hyphenated words as these sometimes contain common words.
return preg_replace('/b('.implode('|',$commonWords).')b/i','',$input);
thanks
Assuming you want to remove both ( and ) from the $search string:
$search = preg_replace('/(|)/','',$search);
I think the fastest way to do this is using the strtr function, like this:
$search = strtr($search, array('(' => '', ')' => ''));
AFAIK Lucene can do what you want. With StandardAnalyzer and StopAnalyzer you can to the stop word removal. In combination with the Lucene contrib-snowball (which includes work from Snowball) project you can do the stemming too.
But for stemming also consider this answer to: Stemming algorithm that produces real words
How about this?
([a-zA-Z]+)s([A-Z][a-z]*)s([a-zA-Z]+)
This doesn't take into account anything non-alphabetic though. It also assumes that all words are separated by a single whitespace character. You will need to modify it if you want more complex support.
Try
This adds negative lookaround expressions to the start and end of the regex so that a match is only allowed if there is no dash before or after the match.