{"url":"https://hiroy.hatenadiary.jp/entry/20061027/1161929779","blog_url":"https://hiroy.hatenadiary.jp/","categories":[],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhiroy.hatenadiary.jp%2Fentry%2F20061027%2F1161929779\" title=\"\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u30c1\u30a7\u30c3\u30af - hiroy\u306e\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"width":"100%","title":"\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u30c1\u30a7\u30c3\u30af","blog_title":"hiroy\u306e\u30d6\u30ed\u30b0","description":"PHP\u3067\u9023\u60f3\u914d\u5217\u306e\u30ad\u30fc\u306e\u5b58\u5728\u6709\u7121\u3092\u78ba\u8a8d\u3059\u308b\u5834\u5408\u3001\u305d\u306e\u5024\u304cnull\u3067\u3042\u308b\u53ef\u80fd\u6027\u3092\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002 $array = array('foo' => 'a', 'bar' => null); var_dump(isset($array['foo'])); // true var_dump(isset($array['bar'])); // false var_dump(array_key_exists('foo', $array)); // true var_dump(array_key_exists('bar', $array)); // true\u8981\u7d20\u306e\u5024\u304cnull\u306e\u5834\u5408\u3001\u30ad\u30fc\u3068\u3057\u3066\u5b58\u5728\u3057\u3066\u3044\u305f\u2026","provider_url":"https://hatena.blog","author_name":"hiro_y","author_url":"https://blog.hatena.ne.jp/hiro_y/","provider_name":"Hatena Blog","type":"rich","height":"190","published":"2006-10-27 15:16:19","version":"1.0"}