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

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

        return $this->data[self::SOFTWARE];
    }
Returns the software, if it exists

@return string|boolean