<?php
//垃圾分类
class Garbage implements JsonSerializable
{
    private $name;
    private $category;
    private $create_at;
    private $update_at;

    /**
     * Garbage constructor.
     * @param $name
     * @param $category
     * @param $create_at
     * @param $update_at
     */
    public function __construct($name, $category, $create_at, $update_at)
    {
        $this->name = $name;
        $this->category = $category;
        $this->create_at = $create_at;
        $this->update_at = $update_at;
    }

    /**
     * @return mixed
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * @return mixed
     */
    public function getCategory()
    {
        return $this->category;
    }

    /**
     * @return mixed
     */
    public function getCreateAt()
    {
        return $this->create_at;
    }

    /**
     * @return mixed
     */
    public function getUpdateAt()
    {
        return $this->update_at;
    }

    public function jsonSerialize()
    {
        $data = [];
        foreach ($this as $key => $val) {
            if ($val !== null) $data[$key] = $val;
        }
        return $data;
    }

}