{"type":"rich","description":"PHP5\u3067\u5c0e\u5165\u3055\u308c\u305f\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0\u3002\u95a2\u6570\u306e\u5f15\u6570\u306b\u578b\u60c5\u5831\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3002 <? php class Entertainment {} class Clown extends Entertainment {} class Job {} function handleEntertainment(Entertainment $a, callable $callback = NULL) { echo \"Handling \" . get_class($a) . \" fun\\n\"; if ($callback !== NULL) { $callback(); } } $callback = func\u2026","version":"1.0","blog_url":"https://rokujo.hatenadiary.com/","height":"190","categories":["\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"],"url":"https://rokujo.hatenadiary.com/entry/2015/06/09/184658","provider_name":"Hatena Blog","width":"100%","provider_url":"https://hatena.blog","author_name":"happyholiday","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frokujo.hatenadiary.com%2Fentry%2F2015%2F06%2F09%2F184658\" title=\"PHP\u306e\u3086\u308b\u30fc\u3044\u578b\u4ed8\u3051\u3001\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0 - \u516d\u5e16\u306e\u304b\u305f\u3059\u307f\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"PHP\u306e\u3086\u308b\u30fc\u3044\u578b\u4ed8\u3051\u3001\u30bf\u30a4\u30d7\u30d2\u30f3\u30c6\u30a3\u30f3\u30b0","blog_title":"\u516d\u5e16\u306e\u304b\u305f\u3059\u307f","image_url":null,"author_url":"https://blog.hatena.ne.jp/happyholiday/","published":"2015-06-09 18:46:58"}