<?php
require 'config.php';

class steam
{

    public $result;

    public function getOwnedGames($urls = 'http://api.steampowered.com/IPlayerService/GetOwnedGames/v1/?')
    {
        $params = http_build_query([
            'key'=>APIKEY,
            'steamid'=>STEAMID,
            'include_appinfo'=>1,
            'include_played_free_games'=>0,
            //'appids_filter'=>''
        ]);
         $this->result = file_get_contents($urls.$params,true);
         return $this;
    }

    public function viewOwnedGames()
    {
        $data = json_decode($this->result);
        
        foreach($data->response->games as $val){
            $tumiGames = (int)$val->playtime_forever === 0?' [積みゲー]':'';
            printf('ゲーム名：%s プレイ時間：%02d時%02d分%s<br>',$val->name,(int)($val->playtime_forever / 60),(int)($val->playtime_forever % 60),$tumiGames);
        }
        return $this;
    }
}

(new steam)->getOwnedGames()->viewOwnedGames();

    

<?php
/**
 * チェーンクラス？数珠繋ぎクラス？関数の作り方．
 */
class ChainClass{
    public $value = 0;

    /**
     * 加算関数
     */
    public function add($value)
    {
        $this->value = $this->value + $value;
        return $this;
    }

    /**
     * 乗算関数
     */
    public function multiplication($value)
    {
        $this->value = $this->value * $value;
        return $this;
    }

    /**
     * 解を表示する関数
     */
    public function answer()
    {
        printf('答えは%dです',$this->value);
        return $this;
    }
}

(new ChainClass)->add(2)->add(3)->multiplication(10)->add(5)->answer();