{"id":2536,"date":"2022-07-23T20:34:00","date_gmt":"2022-07-23T11:34:00","guid":{"rendered":"https:\/\/uda2.com\/blog\/?p=2536"},"modified":"2022-07-23T20:35:43","modified_gmt":"2022-07-23T11:35:43","slug":"php81","status":"publish","type":"post","link":"https:\/\/uda2.com\/blog\/php81\/","title":{"rendered":"FILTER_SANITIZE_STRING\u306f\u30c0\u30e1\u3067\u3059\u3002"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">PHP8.1\u306b\u306a\u3063\u3066\u304b\u3089\u300cFILTER_SANITIZE_STRING\u300d\u306f\u975e\u63a8\u5968\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cFILTER_SANITIZE_STRING\u300d\u306ffilter_input\u3084filter_var\u3067\u5229\u7528\u3059\u308b\u30d5\u30a3\u30eb\u30bf\u30fc\u306e\u4e00\u3064\u3067\u3059\u3002<br>\u7279\u306b\u300cFILTER_SANITIZE_STRING\u300d\u3092\u591a\u69d8\u3057\u3066\u305f\u8a33\u3067\u306f\u4f55\u3067\u3059\u304c\u305d\u306e\u540d\u524d\u304b\u3089\u300c\u6587\u5b57\u3092\u7121\u5bb3\u5316\u300d\u3059\u308b\u3068\u3044\u3046\u30a4\u30e1\u30fc\u30b8\u3067\u7c21\u6613\u7684\u306b\u51e6\u7406\u3057\u305f\u3044\u3068\u304d\u306b\u306f\u4f7f\u3063\u3066\u3044\u307e\u3057\u305f\u3002<br>\u975e\u63a8\u5968\u306e\u77e5\u3089\u305b\u3092\u53d7\u3051\u3066\u6539\u3081\u3066\u8abf\u3079\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>\u516c\u5f0f\u306e\u89e3\u8aac\u300c<a href=\"https:\/\/www.php.net\/manual\/ja\/filter.filters.sanitize.php\" target=\"_blank\" rel=\"noopener\">PHP: \u9664\u53bb\u30d5\u30a3\u30eb\u30bf &#8211; Manual<\/a>\u300d\u306b\u3088\u308b\u3068FILTER_SANITIZE_STRING\u306f\u4e0b\u8a18\u306e\u69d8\u306b\u306a\u3063\u3066\u307e\u3059\u3002<\/p>\n<blockquote style=\"margin:0.5em 0 1.5em 1.5em;color: #6EAF2D;\">\u30bf\u30b0\u3068\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3001\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3092\u53d6\u308a\u9664\u304d\u307e\u3059\u3002 \u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3001 \u7279\u6b8a\u6587\u5b57\u3092\u53d6\u308a\u9664\u3044\u305f\u308a\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u308a\u3057\u307e\u3059\u3002 \u30af\u30a9\u30fc\u30c8\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u52d5\u4f5c\u306f\u3001 FILTER_FLAG_NO_ENCODE_QUOTES \u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u7121\u52b9\u306b\u51fa\u6765\u307e\u3059\u3002<\/blockquote>\n\n\n\n<p>\u524a\u9664\u306e\u77e5\u3089\u305b\u3092\u53d7\u3051\u3066\u8abf\u3079\u3066\u307f\u305f\u3089\u300c100 &gt; &lt;p&gt;&#8221;\u30c6\u30b9\u30c8&#8221;&lt;\/p&gt; &lt; 100\u300d\u307f\u305f\u3044\u306a\u6587\u5b57\u306f\u300c100 &gt; &amp;#34;\u30c6\u30b9\u30c8&amp;#34; \u300d\u3068\u5fae\u5999\u306b\u306a\u7d50\u679c\u3067\u3059\u3002<br>\nHTML\u306e\u9589\u3058\u30bf\u30b0\u306f\u305d\u306e\u307e\u307e\u3067\u3059\u3057\u3001\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u306f\u6d88\u3048\u305a\u306bHTML\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3055\u308c\u3066\u307e\u3059\u3057\u3001\u53f3\u5074\u304c\u6d88\u3048\u3066\u3057\u307e\u3063\u3066\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u79c1\u304c\u516c\u5f0f\u306e\u6587\u7ae0\u3092\u898b\u3066\u60f3\u50cf\u3057\u305f\u306e\u306fstrip_tags\u3067\u30bf\u30b0\u3092\u9664\u53bb\u3057\u3066\u30bf\u30b0\u306e\u8a18\u53f7\u3084\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\u3001\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u304c\u6d88\u3048\u305f\u72b6\u614b\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u79c1\u306e\u60f3\u50cf\u3057\u305f\u30d5\u30a3\u30eb\u30bf\u30fc\u51e6\u7406\u3092\u66f8\u3044\u3066\u898b\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<pre><code>$sample = filter_input(INPUT_POST, \"sample\", FILTER_DEFAULT);\nif ($sample !== null &amp;&amp; $sample !== false) {\n  $sample = filter_var($sample, FILTER_DEFAULT, FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_BACKTICK);\n  $sample = str_replace(array('\"', \"'\", \"&lt;\", \"&gt;\"), \"\", strip_tags($sample));\n  echo htmlspecialchars($sample, ENT_QUOTES, \"UTF-8\"));\n}<\/code><\/pre>\n\n\n\n<p>\u6642\u3068\u5834\u5408\u306b\u3088\u308a\u307e\u3059\u304cfilter_input\u3067\u306f\u30c1\u30a7\u30c3\u30af\u305b\u305a\u306bfilter_var\u3067\u30c1\u30a7\u30c3\u30af\u3055\u305b\u308b\u4e8b\u304c\u591a\u3044\u3067\u3059\u3002<br>\u591a\u5c11\u5197\u9577\u3067\u3059\u304c2\u3064\u306b\u5206\u3051\u308b\u4e8b\u3067\u6570\u5b57\u5165\u529b\u306e\u969b\u306b\u5168\u89d2\u6570\u5b57\u3092\u5165\u529b\u3057\u3066\u3057\u307e\u3046\u65b9\u306e\u70ba\u306b\u524d\u3082\u3063\u3066\u534a\u89d2\u6570\u5024\u306b\u5909\u63db\u3057\u305f\u5f8c\u3067\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u639b\u3051\u305f\u308a\u3067\u304d\u305f\u308a\u3057\u307e\u3059\u3002<br>\u30aa\u30d7\u30b7\u30e7\u30f3\u306f<br>FILTER_FLAG_STRIP_LOW\u306fASCII\u30b3\u30fc\u30c9\u304c32\u672a\u6e80\u306e\u6587\u5b57\u304c\u9664\u53bb\u3055\u308c\u307e\u3059\u3002\u6539\u884c\u3084\u30bf\u30d6\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u524d\u51e6\u7406\u3067\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br>FILTER_FLAG_STRIP_HIGH\u306fASCII\u30b3\u30fc\u30c9\u304c127\u3088\u308a\u5927\u304d\u3044\u306e\u6587\u5b57\u304c\u9664\u53bb\u3055\u308c\u307e\u3059\u3002\u30de\u30eb\u30c1\u30d0\u30a4\u30c8\u6587\u5b57\u3092\u9664\u53bb\u3057\u305f\u3044\u6642\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<br>FILTER_FLAG_STRIP_BACKTICK\u306f\u30d0\u30c3\u30af\u30af\u30a9\u30fc\u30c8\u6587\u5b57\u3092\u9664\u53bb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HTML\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3059\u308b\u306a\u3089FILTER_SANITIZE_SPECIAL_CHARS\u3068\u3044\u3046\u306e\u304c\u3042\u308a\u307e\u3059\u304c\u30b3\u30c1\u30e9\u306f8.1\u3067\u3082\u5229\u7528\u3067\u304d\u307e\u3059\u3002<br>\u305f\u3060htmlspecialchars\u306f\u300c&amp;quot; &amp;gt; &amp;lt;\u300d\u3068\u6587\u5b57\u5f0f\u3067\u3059\u304cFILTER_SANITIZE_SPECIAL_CHARS\u306f\u300c&amp;#34; &amp;#62; &amp;#60;\u300d\u3068\u6570\u5b57\u5f0f\u306a\u306e\u3067\u623b\u3059\u969b\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP8.1\u306b\u306a\u3063\u3066\u304b\u3089\u300cFILTER_SANITIZE_STRING\u300d\u306f\u975e\u63a8\u5968\u306b\u306a\u308a\u307e\u3057\u305f\u3002 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