{"description":"% php -r 'var_dump(is_numeric(\"+0123.45e6\"), +0123.45e6); > var_dump(is_numeric(\"-0123\"), -0123);' bool(true) float(123450000) bool(true) int(-83)\u3053\u306e\u7d50\u679c\u3092\u8e0f\u307e\u3048\u3001is_numeric() \u3067\u771f\u3068\u306a\u308b\u6587\u5b57\u5217\u306f\u3001\u30af\u30a9\u30fc\u30c8\u3057\u306a\u304b\u3063\u305f\u5834\u5408 PHP \u306e\u30d1\u30fc\u30b6\u3067\u6570\u5024\u3068\u3057\u3066\u8a55\u4fa1\u3055\u308c\u308b\u6587\u5b57\u5217\u3067\u3042\u308b\u3068\u3044\u3046\u4e88\u6e2c *1 \u306b\u57fa\u3065\u3044\u3066\u3001\u5148\u65e5\u306e\u30a8\u30f3\u30c8\u30ea (d:id:rsky:20061127:1164705790) \u3092\u4e00\u90e8\u4fee\u6b63\u3002 \u3053\u308c\u306b\u3088\u308a\u30018\u9032\u6570\u3084\u6307\u6570\u8868\u8a18\u3082\u6b63\u3057\u304f\u8a55\u4fa1\u3067\u304d\u308b\u2026","title":" is_numeric() & eval()","blog_title":"\u8b83\u5bb9\u65e5\u8a18","width":"100%","image_url":null,"published":"2006-11-28 01:22:33","provider_url":"https://hatena.blog","categories":["PHP"],"url":"https://blog.r-sky.jp/entry/20061128/1164730953","provider_name":"Hatena Blog","blog_url":"https://blog.r-sky.jp/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.r-sky.jp%2Fentry%2F20061128%2F1164730953\" title=\" is_numeric() &amp; eval() - \u8b83\u5bb9\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"rsky","author_url":"https://blog.hatena.ne.jp/rsky/","height":"190","version":"1.0","type":"rich"}