日本の祝日を取得する

{
    "2019-01-01": "元日",
    "2019-01-14": "成人の日",
    "2019-02-11": "建国記念の日",
    "2019-03-21": "春分の日",
    "2019-04-29": "昭和の日",
    "2019-04-30": "祝日",
    "2019-05-01": "天皇の即位の日",
    "2019-05-02": "祝日",
    "2019-05-03": "憲法記念日",
    "2019-05-04": "みどりの日",
    "2019-05-05": "こどもの日",
    "2019-05-06": "こどもの日 振替休日",
    "2019-07-15": "海の日",
    "2019-08-11": "山の日",
    "2019-08-12": "山の日 振替休日",
    "2019-09-16": "敬老の日",
    "2019-09-23": "秋分の日",
    "2019-10-14": "体育の日",
    "2019-10-22": "即位礼正殿の儀の行われる日",
    "2019-11-03": "文化の日",
    "2019-11-04": "文化の日 振替休日",
    "2019-11-23": "勤労感謝の日",
    "2020-01-01": "元日",
    "2020-01-13": "成人の日",
    "2020-02-11": "建国記念の日",
    "2020-02-23": "天皇誕生日",
    "2020-02-24": "天皇誕生日 振替休日",
    "2020-03-20": "春分の日",
    "2020-04-29": "昭和の日",
    "2020-05-03": "憲法記念日",
    "2020-05-04": "みどりの日",
    "2020-05-05": "こどもの日",
    "2020-05-06": "憲法記念日 振替休日",
    "2020-07-23": "海の日",
    "2020-07-24": "スポーツの日",
    "2020-08-10": "山の日",
    "2020-09-21": "敬老の日",
    "2020-09-22": "秋分の日",
    "2020-11-03": "文化の日",
    "2020-11-23": "勤労感謝の日",
    "2021-01-01": "元日",
    "2021-01-11": "成人の日",
    "2021-02-11": "建国記念の日",
    "2021-02-23": "天皇誕生日",
    "2021-03-20": "春分の日",
    "2021-04-29": "昭和の日",
    "2021-05-03": "憲法記念日",
    "2021-05-04": "みどりの日",
    "2021-05-05": "こどもの日",
    "2021-07-19": "海の日",
    "2021-08-11": "山の日",
    "2021-09-20": "敬老の日",
    "2021-09-23": "秋分の日",
    "2021-10-11": "スポーツの日",
    "2021-11-03": "文化の日",
    "2021-11-23": "勤労感謝の日"
}

<?php
//上のdate.jsonを読み込むtest.php

$url = "./date.json";
	    if ($results = file_get_contents($url, true))
		{
	        // JSON形式で取得した情報を配列に格納
	        $results = json_decode($results);


	        // 年月日をキー、祝日名を配列に格納

foreach(json_decode(file_get_contents($url), true) as $key => $value) {
	            $date = strtotime((string) $key);
	            $title = (string) $value;
	            $holidays[date('Y-m-d', $date)] = $value;
	        }
	        // 祝日の配列を並び替え
	        ksort($holidays);
	    }

	    return $holidays;
	}

	// 祝日取得
	$national_holiday = japan_holiday($y);

//  print_r($national_holiday);
        //休日
        if(!empty($_GET['date'])){
          $yyy2 = $y;
          $key=$y;
        }else{//値が空なら今年
          $yyy2=date("Y",strtotime("+0 year"));
          $key=$yyy2;
        }
        
        
        foreach($national_holiday as $key => $value ){
          $key2 =$key;
          $key2 = str_replace("年", "-", $key2);
          $key2 = str_replace("月", "-", $key2);
          $key2 = str_replace("日", "", $key2);
          $yyy=substr($key, 0,4);
          
          //$yyy2=date("Y",strtotime("+0 year"));
          
          
          $week = array("日", "月", "火", "水", "木", "金", "土");
          $w = (int)date_format($key2, 'w');
          $datetime = date_create($key2);
          $w = (int)date_format($datetime, 'w');
          $week[$w]="(".$week[$w]."曜日)";
          if($yyy2==$yyy){
            $total0 += 1;
            if (!preg_match('/振替休日/', $value)) {
              //含まれる場合
              $total += 1;
            }
            //$cnt .= count($is);
            echo "<p>".$key.$week[$w]. "：" .$value."</p>"; // 改行しながら値を表示
            $total += $b;
          }
        }
        echo "<h3>祝日は".$total."日あります。(振替休日含めて".$total0."日)</h3>";