lib/PHPExif/Exif.php
public function getFileSize()
    {
        if (!isset($this->data[self::FILESIZE])) {
            return false;
        }
        
        return $this->data[self::FILESIZE];
    }
public function getFileSize()
    {
        if (!isset($this->data[self::FILESIZE])) {
            return false;
        }
        
        return $this->data[self::FILESIZE];
    }
Returns the filesize, if it exists

@return int|boolean