{"blog_title":"\u30d1\u30f3\u30af\u306f\u3044\u3064\u3082\u7a81\u7136\u306b","published":"2023-04-07 07:59:47","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdoroyamada.hatenablog.jp%2Fentry%2F20230407%2F1680821987\" title=\"IP\u30a2\u30c9\u30ec\u30b9\u5f62\u5f0f\u304b\u8abf\u3079\u308bphp\u30b9\u30af\u30ea\u30d7\u30c8 - \u30d1\u30f3\u30af\u306f\u3044\u3064\u3082\u7a81\u7136\u306b\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/doroyamada/","categories":["PC"],"image_url":null,"url":"https://doroyamada.hatenablog.jp/entry/20230407/1680821987","description":"\u30c0\u30a4\u30ca\u30df\u30c3\u30afDNS\u306e\u66f4\u65b0\u30b9\u30af\u30ea\u30d7\u30c8\u306eIP\u30a2\u30c9\u30ec\u30b9\u53d6\u5f97\u90e8\u5206\u3067\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u8aa4\u52d5\u4f5c\u3057\u3066\u3044\u305f\u306e\u3067\u3001IP\u30a2\u30c9\u30ec\u30b9\u30c1\u30a7\u30c3\u30af\u90e8\u5206\u3092\u53b3\u683c\u5316\u3002IPv4\u9650\u5b9a\u3002 <?php function is_ip($ip){ $numbers = explode('.',rtrim($ip)); foreach($numbers as $number){ if(!is_int($number)) {return FALSE;} if($number < 1 || $number > 255) {return FALSE;} } return TRUE; } ?> \u5909\u6570\u306e\u578b\u304c\u30d5\u30ec\u30ad\u30b7\u30d6\u30eb\u306aphp\u306a\u3089\u3067\u306f\u3002","version":"1.0","title":"IP\u30a2\u30c9\u30ec\u30b9\u5f62\u5f0f\u304b\u8abf\u3079\u308bphp\u30b9\u30af\u30ea\u30d7\u30c8","width":"100%","type":"rich","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","author_name":"doroyamada","height":"190","blog_url":"https://doroyamada.hatenablog.jp/"}