public function create($diary_id, $user_id) { if (empty(self::$conn)) { self::$conn = $this->connectPdo(); } $sql = "INSERT INTO like_diary(diary_id,user_id)\r\n VALUE(?,?)"; $stmt = self::$conn->prepare($sql); $stmt->bindParam(1, $diary_id); $stmt->bindParam(2, $user_id); if ($stmt->execute()) { return true; } else { return false; } }