public function getUniqueWords($string)
    {
        $words = $this->getWords($string);
        $analysis = new FrequencyAnalysis($words);
        $words = $analysis->getKeyValuesByFrequency();

        return array_unique(array_keys($words));
    }
public function getUniqueWords($string)
    {
        $words = $this->getWords($string);
        $analysis = new FrequencyAnalysis($words);
        $words = $analysis->getKeyValuesByFrequency();

        return array_unique(array_keys($words));
    }
public function getUniqueWords ( $ string ) { $ words = $ this -> getWords ( $ string ) ; $ analysis = new FrequencyAnalysis ( $ words ) ; $ words = $ analysis -> getKeyValuesByFrequency ( ) ; return array_unique ( array_keys ( $ words ) ) ; }
Get unique words.

@param string $string

@return array
Get unique words .