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

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

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

@return string|boolean