gistfile1.txt

        $count = $boost = count($matches);
 +            $query .= "(or (phrase boost=" . ($boost+1) . " '" . $keyword . "')";
  
 +            for($i=0; $i < $count -1; $i++ )
 +            {                
 +                $query .="(and (phrase boost={$boost} '" . $matches[$i] . "'))";
 +                $boost-=1;
 +            }
 +            $query .= "(prefix boost={$boost} '" . $matches[$i] . "'))";