{"id":28381,"date":"2024-03-18T17:35:09","date_gmt":"2024-03-18T08:35:09","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/php%e3%81%aestrpos%e9%96%a2%e6%95%b0%e3%81%ae%e7%9b%ae%e7%9a%84%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2024-03-22T18:27:09","modified_gmt":"2024-03-22T09:27:09","slug":"php%e3%81%aestrpos%e9%96%a2%e6%95%b0%e3%81%ae%e7%9b%ae%e7%9a%84%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/php%e3%81%aestrpos%e9%96%a2%e6%95%b0%e3%81%ae%e7%9b%ae%e7%9a%84%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"php\u306estrpos\u95a2\u6570\u306e\u76ee\u7684\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>PHP \u3067\u3001`strpos()` \u95a2\u6570\u306f\u6307\u5b9a\u3057\u305f\u30b5\u30d6\u6587\u5b57\u5217\u306e\u4f4d\u7f6e\u3092\u691c\u7d22\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u6307\u5b9a\u3057\u305f\u30b5\u30d6\u6587\u5b57\u5217\u304c\u6700\u521d\u306b\u73fe\u308c\u308b\u4f4d\u7f6e\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8fd4\u3057\u3001\u30b5\u30d6\u6587\u5b57\u5217\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306f `false` \u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<p>`strpos()` \u95a2\u6570\u306b\u306f\u30012\u3064\u306e\u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>1. \u30d8\u30a4\u30b9\u30bf\u30c3\u30af\uff1a\u691c\u7d22\u3059\u308b\u5fc5\u8981\u306e\u3042\u308b\u6587\u5b57\u5217\u3002<\/p>\n<p>2. needle\uff1a\u691c\u7d22\u3059\u308b\u30b5\u30d6\u30b9\u30c8\u30ea\u30f3\u30b0\u3002<\/p>\n<p>\u4ee5\u4e0b\u306f`strpos()`\u95a2\u6570\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30fc\u30c9\u306e\u4f8b\u3067\u3059\uff1a<\/p>\n<pre class=\"post-pre\">$haystack\u00a0=\u00a0\"Hello,\u00a0world!\";\r\n$needle\u00a0=\u00a0\"world\";\r\n$position\u00a0=\u00a0strpos($haystack,\u00a0$needle);\r\nif\u00a0($position\u00a0!==\u00a0false)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0echo\u00a0\"\u5b50\u4e32\u00a0'$needle'\u00a0\u5728\u5b57\u7b26\u4e32\u00a0'$haystack'\u00a0\u4e2d\u7684\u4f4d\u7f6e\u4e3a:\u00a0$position\";\r\n}\u00a0else\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0echo\u00a0\"\u5b50\u4e32\u00a0'$needle'\u00a0\u672a\u627e\u5230\";\r\n}<\/pre>\n<p>\u300c&#8217;Hello, world!&#8217;\u3068\u3044\u3046\u6587\u5b57\u5217\u5185\u3067\u3001\u90e8\u5206\u6587\u5b57\u5217&#8217;world&#8217;\u306e\u4f4d\u7f6e\u306f7\u306b\u306a\u308a\u307e\u3059\u300d\u3068\u3044\u3046\u4f8b\u304c\u793a\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u8981\u603b\u7ed3\uff0c`strpos()`\u51fd\u6570\u7684\u4f5c\u7528\u662f\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u6307\u5b9a\u5b50\u4e32\u7684\u4f4d\u7f6e\uff0c\u5e76\u8fd4\u56de\u5176\u4f4d\u7f6e\u7d22\u5f15\u3002\u5728PHP\u4e2d\uff0c\u5b83\u7ecf\u5e38\u7528\u4e8e\u5b57\u7b26\u4e32\u5904\u7406\u548c\u641c\u7d22\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP \u3067\u3001`strpos()` \u95a2\u6570\u306f\u6307\u5b9a\u3057\u305f\u30b5\u30d6\u6587\u5b57\u5217\u306e\u4f4d\u7f6e\u3092\u691c\u7d22\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u6307\u5b9a\u3057\u305f\u30b5\u30d6\u6587\u5b57\u5217\u304c\u6700\u521d\u306b\u73fe\u308c\u308b\u4f4d\u7f6e\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8fd4\u3057\u3001\u30b5\u30d6\u6587\u5b57\u5217\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306f `false` \u3092\u8fd4\u3057\u307e\u3059\u3002 `st [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-28381","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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