lib/PHPExif/Exif.php
public function getKeywords()
    {
        if (!isset($this->data[self::KEYWORDS])) {
            return false;
        }

        return $this->data[self::KEYWORDS];
    }
public function getKeywords()
    {
        if (!isset($this->data[self::KEYWORDS])) {
            return false;
        }

        return $this->data[self::KEYWORDS];
    }
Returns the keywords, if they exists

@return array|boolean