getPK()}|{$this->getTitle()}|{$this->getSequence()}번째"; } //Common Function public function getPK(): int { return $this->attributes['pid']; } //한게시물에 여러개가 있을경우 번호 final public function getSequence(): int { return $this->attributes['file_sequence']; } public function setSequence(int $file_sequence): void { $this->attributes['file_sequence'] = $file_sequence; } }