{"width":"100%","provider_url":"https://hatena.blog","author_name":"shigemk2","blog_title":"by shigemk2","author_url":"https://blog.hatena.ne.jp/shigemk2/","published":"2013-02-21 01:43:18","description":"\u3061\u3087\u3063\u3068\u3057\u305f\u5b9f\u9a13\u3067\u3059\u3002 <?php <?php $hoge = array(1, 2, 3); var_dump(array_key_exists(array(), $hoge)); // bool(false) \u3053\u3093\u306a\u30a8\u30e9\u30fc\u304c\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002 PHP Warning: array_key_exists(): The first argument should be either a string or an integer\u540c\u69d8\u306b\u3057\u3066\u3001 <?php $hoge = array(1, 2, 3); var_dump(isset($hoge[array()])); // bool(false) PH\u2026","title":"array_key_exists\u306e\u7b2c\u4e00\u5f15\u6570\u306barray\u3092\u653e\u308a\u8fbc\u3080","url":"https://www.shigemk2.com/entry/20130221/1361378598","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20130221%2F1361378598\" title=\"array_key_exists\u306e\u7b2c\u4e00\u5f15\u6570\u306barray\u3092\u653e\u308a\u8fbc\u3080 - 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>","categories":["PHP"],"type":"rich","version":"1.0","image_url":null,"height":"190","blog_url":"https://www.shigemk2.com/"}