note 33640 rejected from function.unset by didou

Note Submitter: brian from alternativewriting.com ---- is it possible to use the unset() command to remove variables from an array? for example $keywords is an array of words in a search engine i made. Would this code work to remove simple words from it such as 'a', 'an', or 'in'... foreach($keywords as $test) { if ($test = "a") {unset($test);} if ($test = "an") {unset($test);} if ($test = "in") }