{"provider_name":"Hatena Blog","published":"2012-10-02 18:33:10","provider_url":"https://hatena.blog","image_url":null,"description":"array_keys\u305d\u306e\u3082\u306e\u306b\u3064\u3044\u3066\u306f\u3053\u3061\u3089\u3092\u53c2\u7167\u306e\u3053\u3068\u3002 PHP: array_keys - Manual\u9023\u60f3\u914d\u5217\u3092array_keys\u3057\u3066\u307f\u308b\u3068\u2026 <?php $hash = array( '1'=>'one', '2'=>'two', '3'=>'three', ); $array = array_keys($hash); print_r($array); Array ( [0] => 1 [1] => 2 [2] => 3 )\u307e\u3042\u3053\u3046\u306a\u308b\u3088\u306d\u3002\u3067\u306f\u3001\u591a\u6b21\u5143\u914d\u5217\u3067\u306f\u3069\u3046\u306a\u308b\u306e\u3060\u308d\u3046\u304b\u3002 <?php $hash2 = array(); $hash2['hoge']['foo'] = 1; \u2026","blog_url":"https://www.shigemk2.com/","blog_title":"by shigemk2","author_url":"https://blog.hatena.ne.jp/shigemk2/","version":"1.0","title":"\u591a\u6b21\u5143\u914d\u5217\u306b\u304a\u3051\u308barray_keys","categories":["PHP"],"url":"https://www.shigemk2.com/entry/20121002/1349170390","width":"100%","height":"190","author_name":"shigemk2","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20121002%2F1349170390\" title=\"\u591a\u6b21\u5143\u914d\u5217\u306b\u304a\u3051\u308barray_keys - by shigemk2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich"}