<?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"
    }
}

using System;
using System.IO;
using System.Windows.Forms;
using Google.Cloud.TextToSpeech.V1;
namespace テキストを日本語ボイスする
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            if(richTextBox1.Text.Replace("\r", "").Replace("\n", "") == "")
            {
                MessageBox.Show("文字を入力してください");
                return;
            }
            Environment.SetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS", "C:\\xxxxx\\xxxxx\\xxxxx\\xxxxx.json", EnvironmentVariableTarget.Process);
            TextToSpeechClient client = TextToSpeechClient.Create();
            SynthesisInput input = new SynthesisInput
            {
                Text = richTextBox1.Text.Replace("\r", "").Replace("\n", "")
            };
            VoiceSelectionParams voice = new VoiceSelectionParams
            {
                LanguageCode = "ja-JP",
                Name = "ja-JP-Wavenet-A",
                SsmlGender = SsmlVoiceGender.Neutral,
            };
            AudioConfig config = new AudioConfig
            {
                AudioEncoding = AudioEncoding.Mp3,
                SpeakingRate = f1(trackBar1.Value),
                Pitch = f2(trackBar2.Value),
            };
            var response = client.SynthesizeSpeech(new SynthesizeSpeechRequest
            {
                Input = input,
                Voice = voice,
                AudioConfig = config
            });
            DateTime dt = DateTime.Now;
            string dttimename = dt.ToString("yyyy-MM-dd-HH-mm-ss");
            using (Stream output = File.Create("voice-" + dttimename + ".mp3"))
            {
                response.AudioContent.WriteTo(output);
                Console.WriteLine($"Audio content written to file 'voice - " + dttimename + ".mp3'");
                MessageBox.Show("生成しました=>>voice - " + dttimename + ".mp3");
                System.Diagnostics.Process.Start(Directory.GetCurrentDirectory());
            }
        }
        private void trackBar1_ValueChanged(object sender, EventArgs e)
        {
            label3.Text = string.Format("{0:0.00}", f1(trackBar1.Value));
        }
        private void trackBar2_ValueChanged(object sender, EventArgs e)
        {
            label4.Text = string.Format("{0:0.00}", f2(trackBar2.Value));
        }
        private double f1(int a) {
            return Convert.ToDouble(a) / 100;
        }
        private double f2(int a)
        {
            return Convert.ToDouble(a) - 20;
        }
    }
}