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

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

        return $this->data[self::SOURCE];
    }
Returns the source

@return string|boolean