0 ){        if ( strlen($result[0]) == 2 ){              $matched = preg_match('/'.$words.'/iu', $string, $result);        }         if ( $matched && isset($result[0]) && strlen($result[0]) > 0 ) {              return true;         }else{              return false;         }     }else{         return false;    }}$content = '测试关键字';if ( banwordCheck($content, './banwords.txt') ){    echo "matched! ";}else{    echo "no match! ";}