{"height":"190","blog_url":"https://tookikimie.hatenablog.com/","categories":["\u6280\u8853\u30e1\u30e2","php"],"url":"https://tookikimie.hatenablog.com/entry/2019/01/10/220047","author_name":"tookikimie","author_url":"https://blog.hatena.ne.jp/tookikimie/","provider_url":"https://hatena.blog","title":"\u3010PHP\u3011null\u5408\u4f53\u6f14\u7b97\u5b50\u304c\u3044\u3044\u611f\u3058\u306b\u3057\u3066\u304f\u308c\u308b\u306e\u306fnull\u3060\u3051\u3058\u3083\u306a\u304f\u3066\u672a\u5b9a\u7fa9\u3082","published":"2019-01-10 22:00:47","version":"1.0","width":"100%","type":"rich","blog_title":"\u9060\u304d\u541b\u3078","image_url":null,"provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftookikimie.hatenablog.com%2Fentry%2F2019%2F01%2F10%2F220047\" title=\"\u3010PHP\u3011null\u5408\u4f53\u6f14\u7b97\u5b50\u304c\u3044\u3044\u611f\u3058\u306b\u3057\u3066\u304f\u308c\u308b\u306e\u306fnull\u3060\u3051\u3058\u3083\u306a\u304f\u3066\u672a\u5b9a\u7fa9\u3082 - \u9060\u304d\u541b\u3078\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"http://php.net/manual/ja/migration70.new-features.php#migration70.new-features.null-coalesce-op \u306e\u300cNull \u5408\u4f53\u6f14\u7b97\u5b50\u300d\u306e\u9805\u306b\u66f8\u3044\u3066\u3042\u308b\u901a\u308a\u3063\u3061\u3083\u305d\u3046\u306a\u3093\u3067\u3059\u304c\u3001 \u300cnull\u5408\u4f53\u6f14\u7b97\u5b50\u300d\u3068\u3044\u3046\u540d\u524d\u304b\u3089\u3060\u3068null\u306e\u5834\u5408\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306b\u5909\u3048\u308b\u306e\u306b\u4f7f\u3048\u308b\u5370\u8c61\u3067\u3059\u304c\u3001 \u672a\u5b9a\u7fa9\uff1a\u5909\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u304b\u3063\u305f\u308a\u3001\u914d\u5217\u306e\u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u304b\u3063\u305f\u308a\u3059\u308b\u5834\u5408\u306b\u3082\u4f7f\u3048\u307e\u3059\u3002 // $hoge\u306f\u3053\u3053\u307e\u3067\u3067\u51fa\u3066\u304d\u3066\u3044\u306a\u3044 echo $hoge ?? 'empty' . PHP_EOL; // -> empty echo $h\u2026"}