<?php

namespace App\Wechat;

class WechatParam
{
    private $param;
    private static $_instance = null;

    private function __construct($param)
    {
        $this->param = $param;
    }

    /**
     * 单例模式的实例
     */
    public static function instance()
    {
        if (self::$_instance == null) {
            self::$_instance = new self(
                [
                    'appid'     => 'wxa3dec10df68cd87d',
                    'appsecret' => '17bff4aa5bf1ffa2c15aeb5eea0e2b32',
                ]);
        }
        return self::$_instance;
    }

    /**
     * set方法
     */
    public function set($name, $value)
    {
        $this->param[$name] = $value;
    }

    /**
     * get方法
     */
    public function get($name)
    {
        if (empty($this->param[$name])) {
            return null;
        }

        return $this->param[$name];
    }

    /**
     * 获取所有参数
     */
    public function getParam()
    {
        return $this->param;
    }

    /**
     * 合并参数
     */
    public function merge($arr)
    {
        $this->param = array_merge($this->param,$arr);
    }
}