{"title":"(PHP)\u914d\u5217\u306b\u8981\u7d20\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af","description":"PHP\u3067\u914d\u5217\u306b\u8981\u7d20\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3067\u3059\u3002 \u4eca\u56de\u306f\u30b9\u30fc\u30d1\u30fc\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570 $_POST \u306b\u3001'key' \u3068\u3044\u3046\u8981\u7d20\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u306e\u30c1\u30a7\u30c3\u30af\u3092\u3057\u305f\u3044\u3068\u601d\u3063\u3066\u307e\u3059\u3002 \u3053\u306e\u5834\u5408\u3001array_key_exists \u95a2\u6570\u3092\u4f7f\u3046\u3068\u3044\u3044\u3088\u3046\u3067\u3059\u3002 if (array_key_exists('key', $_POST)) { // \u5b58\u5728\u3059\u308b\u5834\u5408\u306e\u51e6\u7406 } isset \u95a2\u6570\u3067\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u304c\u3001isset \u306e\u5834\u5408\u306f\u30ad\u30fc\u304c\u5b58\u5728\u3057\u3066\u3044\u3066\u3082 false \u3092\u8fd4\u3059\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 \u305d\u308c\u306f\u5024\u304c null \u306e\u5834\u5408\u3067\u3059\u3002 array_key_exists \u306e\u5834\u5408\u306f\u5024\u304cnull\u3067\u3082\u8981\u7d20\u81ea\u8eab\u304c\u5b58\u5728\u3059\u308c\u3070 \u2026","blog_title":"3\u6d41\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u30e1\u30e2\u66f8\u304d","blog_url":"https://3ryupg.hatenablog.com/","version":"1.0","provider_url":"https://hatena.blog","categories":["PHP\u958b\u767a"],"url":"https://3ryupg.hatenablog.com/entry/2011/07/01/021300","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2F3ryupg.hatenablog.com%2Fentry%2F2011%2F07%2F01%2F021300\" title=\"(PHP)\u914d\u5217\u306b\u8981\u7d20\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af - 3\u6d41\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u30e1\u30e2\u66f8\u304d\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","image_url":null,"published":"2011-07-01 02:13:00","author_url":"https://blog.hatena.ne.jp/deloreanmc12/","author_name":"deloreanmc12","provider_name":"Hatena Blog","height":"190","type":"rich"}