<?php
//?
function foo1 (){
    return new class {
        public static function hoge(){
            print "foo1->class->hoge".PHP_EOL;
        }
    };
}
foo1()->hoge();

//?
function foo2(){
    //return array("hoge"=>"foo2->hoge");
    return ["hoge"=>"foo2->hoge"];
}

print foo2()["hoge"].PHP_EOL;

//?
function foo3(){
    $obj = new class{
        public static function hoge(){
            print "foo3->class->hoge".PHP_EOL;
        }
    };
    return $obj;
}

foo3()->hoge();

<?php
//date_default_timezone_set('Asia/Tokyo');
class moon{
    static public $icon = array(
        "0"=>'?',//朔
        "1"=>'?',//朔
        "2"=>'?',//朔
        "3"=>'?',//三日月
        "4"=>'?',//三日月
        "5"=>'?',//三日月
        "6"=>'?',//三日月
        "7"=>'?',//上弦の月',
        "8"=>'?',//上弦の月',
        "9"=>'?',//上弦の月',
        "10"=>'?',//上弦の月',
        "11"=>'?',//上弦の月',
        "12"=>'?',//十三夜月
        "13"=>'?',//十三夜月
        "14"=>'?',//十三夜月
        "15"=>"?",//望月
        "16"=>"?",//望月
        "17"=>"?",//望月
        "18"=>"?",//望月
        "19"=>"?",//寝待月
        "20"=>"?",//寝待月
        "21"=>"?",//寝待月
        "22"=>"?",//寝待月
        "23"=>'?',//下弦の月
        "24"=>'?',//下弦の月
        "25"=>'?',//下弦の月
        "26"=>"?",//二十六夜月
        "27"=>"?",//二十六夜月
        "28"=>"?",//二十六夜月
        "29"=>"?"//二十六夜月
    );
    static public $res = "0";
    static public $moon_gregorian = array(0,2,0,2,2,4,5,6,7,8,9,10);
    public function main($year=2012,$mon=12,$day=12)
    {
        static::$res = ((($year-11)%19)*11 + static::$moon_gregorian[$mon-1]+$day)%30;
    }
    public function icon(){
        return static::$icon[static::$res];
    }
}

<?php
    moon::main($year,$mon,$day);
    $chg = moon::icon();

<?php
class Openweathermap_api{
    public $url = "https://api.openweathermap.org/data/2.5/weather?id=";
    public $appid = "apikey";
    public $ken ="";
    public $response ="";
    public $icon = array(
        "01d"=>"?",
        "02d"=>"?",
        "03d"=>"?",
        "04d"=>"?",//?
        "09d"=>"?",
        "010d"=>"?",
        "011d"=>"?",
        "013d"=>"?",
        "050d"=>"?",
    );
    function __construct()
    {
        $this->ken = (object)(json_decode(@file_get_contents("ken.json"),true));
    }
    function api(){
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $this->url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $this->response =  (object)json_decode(curl_exec($ch),true);
        curl_close($ch);
    }
}
$tenki = New Openweathermap_api();
$tenki->url = "https://api.openweathermap.org/data/2.5/weather?id=".$tenki->ken->kochi["id"]."&appid=".$tenki->appid;
$tenki->api();
print($tenki->icon[str_replace("n","d",$tenki->response->weather[0]["icon"])]);
var_dump($tenki->response);

{
    "hokkaido": {
        "id": "2130037",
        "kenmei": "北海道",
        "kenfurigana": "ほっかいどう"
    },
    "aomori": {
        "id": "2130656",
        "kenmei": "青森県",
        "kenfurigana": "あおもり"
    },
    "iwate": {
        "id": "2112518",
        "kenmei": "岩手県",
        "kenfurigana": "いわて"
    },
    "miyagi": {
        "id": "2111888",
        "kenmei": "宮城県",
        "kenfurigana": "みやぎ"
    },
    "akita": {
        "id": "2113124",
        "kenmei": "秋田県",
        "kenfurigana": "あきた"
    },
    "yamagata": {
        "id": "2110554",
        "kenmei": "山形県",
        "kenfurigana": "やまがた"
    },
    "fukushima": {
        "id": "2112923",
        "kenmei": "福島県",
        "kenfurigana": "ふくしま"
    },
    "ibaraki": {
        "id": "2112669",
        "kenmei": "茨城県",
        "kenfurigana": "いばらき"
    },
    "tochigi": {
        "id": "1850310",
        "kenmei": "栃木県",
        "kenfurigana": "とちぎ"
    },
    "gunma": {
        "id": "1863501",
        "kenmei": "群馬県",
        "kenfurigana": "ぐんま"
    },
    "saitama": {
        "id": "1853226",
        "kenmei": "埼玉県",
        "kenfurigana": "さいたま"
    },
    "chiba": {
        "id": "2113014",
        "kenmei": "千葉県",
        "kenfurigana": "ちば"
    },
    "tokyo": {
        "id": "1850144",
        "kenmei": "東京都",
        "kenfurigana": "とうきょう"
    },
    "kanagawa": {
        "id": "1860291",
        "kenmei": "神奈川県",
        "kenfurigana": "かながわ"
    },
    "niigata": {
        "id": "1855429",
        "kenmei": "新潟県",
        "kenfurigana": "にいがた"
    },
    "toyama": {
        "id": "1849872",
        "kenmei": "富山県",
        "kenfurigana": "とやま"
    },
    "ishikawa": {
        "id": "1861387",
        "kenmei": "石川県",
        "kenfurigana": "いしかわ"
    },
    "fukui": {
        "id": "1863983",
        "kenmei": "福井県",
        "kenfurigana": "ふくい"
    },
    "yamanashi": {
        "id": "1848649",
        "kenmei": "山梨県",
        "kenfurigana": "やまなし"
    },
    "nagano": {
        "id": "1856210",
        "kenmei": "長野県",
        "kenfurigana": "ながの"
    },
    "gifu": {
        "id": "1863640",
        "kenmei": "岐阜県",
        "kenfurigana": "ぎふ"
    },
    "shizuoka": {
        "id": "1851715",
        "kenmei": "静岡県",
        "kenfurigana": "しずおか"
    },
    "aichi": {
        "id": "1865694",
        "kenmei": "愛知県",
        "kenfurigana": "あいち"
    },
    "mie": {
        "id": "1857352",
        "kenmei": "三重県",
        "kenfurigana": "みえ"
    },
    "shiga": {
        "id": "1852553",
        "kenmei": "滋賀県",
        "kenfurigana": "しが"
    },
    "kyoto": {
        "id": "1857907",
        "kenmei": "京都府",
        "kenfurigana": "きょうと"
    },
    "osaka": {
        "id": "1853909",
        "kenmei": "大阪府",
        "kenfurigana": "おおさか"
    },
    "hyogo": {
        "id": "1862047",
        "kenmei": "兵庫県",
        "kenfurigana": "ひょうご"
    },
    "nara": {
        "id": "1855608",
        "kenmei": "奈良県",
        "kenfurigana": "なら"
    },
    "wakayama": {
        "id": "1848938",
        "kenmei": "和歌山県",
        "kenfurigana": "わかやま"
    },
    "tottori": {
        "id": "1849890",
        "kenmei": "鳥取県",
        "kenfurigana": "とっとり"
    },
    "shimane": {
        "id": "1852442",
        "kenmei": "島根県",
        "kenfurigana": "しまね"
    },
    "okayama": {
        "id": "1854381",
        "kenmei": "岡山県",
        "kenfurigana": "おかやま"
    },
    "hiroshima": {
        "id": "1862413",
        "kenmei": "広島県",
        "kenfurigana": "ひろしま"
    },
    "yamaguchi": {
        "id": "1848681",
        "kenmei": "山口県",
        "kenfurigana": "やまぐち"
    },
    "tokushima": {
        "id": "1850157",
        "kenmei": "徳島県",
        "kenfurigana": "とくしま"
    },
    "kagawa": {
        "id": "1860834",
        "kenmei": "香川県",
        "kenfurigana": "かがわ"
    },
    "ehime": {
        "id": "1864226",
        "kenmei": "愛媛県",
        "kenfurigana": "えひめ"
    },
    "kochi": {
        "id": "1859133",
        "kenmei": "高知県",
        "kenfurigana": "こうち"
    },
    "fukuoka": {
        "id": "1863958",
        "kenmei": "福岡県",
        "kenfurigana": "ふくおか"
    },
    "saga": {
        "id": "1853303",
        "kenmei": "佐賀県",
        "kenfurigana": "さが"
    },
    "nagasaki": {
        "id": "1856156",
        "kenmei": "長崎県",
        "kenfurigana": "ながさき"
    },
    "kumamoto": {
        "id": "1858419",
        "kenmei": "熊本県",
        "kenfurigana": "くまもと"
    },
    "oita": {
        "id": "1854484",
        "kenmei": "大分県",
        "kenfurigana": "おおいた"
    },
    "miyazaki": {
        "id": "1856710",
        "kenmei": "宮崎県",
        "kenfurigana": "みやざき"
    },
    "kagoshima": {
        "id": "1860825",
        "kenmei": "鹿児島県",
        "kenfurigana": "かごしま"
    },
    "okinawa": {
        "id": "1854345",
        "kenmei": "沖縄県",
        "kenfurigana": "おきなわ"
    }
}