{"id":6757,"date":"2024-12-05T10:41:13","date_gmt":"2024-12-05T01:41:13","guid":{"rendered":"https:\/\/taitan916.info\/blog\/?p=6757"},"modified":"2024-09-20T21:13:55","modified_gmt":"2024-09-20T12:13:55","slug":"post-6757","status":"publish","type":"post","link":"https:\/\/taitan916.info\/blog\/archives\/6757","title":{"rendered":"PHP\u306b\u3066microtime\u3067\u79d2\u6570\u3092\u6e2c\u5b9a\u3057\u305f\u969b\u300cxxxxxE-5\u300d\u306e\u3088\u3046\u306a\u5024\u306b\u306a\u308b\u5834\u5408\u306e\u5bfe\u5fdc\u65b9\u6cd5"},"content":{"rendered":"<p>PHP\u3067<a href=\"https:\/\/taitan916.info\/blog\/archives\/173\" target=\"_blank\" rel=\"noopener\">\u904e\u53bb\u8a18\u4e8b\u3092\u53c2\u8003<\/a>\u306e\u4e0a\u3001\u3042\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u51e6\u7406\u306b\u304b\u304b\u3063\u305f\u6642\u9593\u3092\u6e2c\u5b9a\u3057\u3088\u3046\u3068\u3057\u305f\u3068\u3053\u308d\u300c4.6968460083008E-5\u300d\u306e\u3088\u3046\u306b\u6570\u5b57\u306e\u6700\u5f8c\u306b\u300cE-5\u300d\u3068\u3044\u3046\u898b\u6163\u308c\u306a\u3044\u8868\u8a18\u304c\u4ed8\u3051\u305f\u3055\u308c\u3066\u8868\u793a\u3055\u308c\u3066\u3044\u305f\u3002\u8abf\u3079\u305f\u3068\u3053\u308d\u6307\u6570\u8868\u8a18\u3068\u3044\u3046\u6570\u306e\u8868\u8a18\u65b9\u6cd5\u3089\u3057\u3044\u3002\u4ee5\u4e0b\u306b\u89e3\u6c7a\u65b9\u6cd5\u3092\u30e1\u30e2\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u6307\u6570\u8868\u8a18\u3068\u306f<\/h2>\n<p><a href=\"https:\/\/ja.wikipedia.org\/wiki\/%E6%8C%87%E6%95%B0%E8%A1%A8%E8%A8%98\" target=\"_blank\" rel=\"noopener\">Wikipedia<\/a>\u306b\u3088\u308b\u3068\u6570\u306e\u8868\u8a18\u65b9\u6cd5\u306e\u3072\u3068\u3064\u3067\u975e\u5e38\u306b\u5927\u304d\u306a\u6570\u307e\u305f\u306f\u975e\u5e38\u306b\u5c0f\u3055\u306a\u6570\u3092\u8868\u8a18\u3059\u308b\u969b\u306b\u5229\u7528\u3055\u308c\u308b\u3068\u306e\u3053\u3068\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u6307\u6570\u8868\u8a18\u306b\u306a\u3063\u305f\u539f\u56e0<\/h2>\n<p>\u4eca\u56de\u306e\u5834\u5408\u306f\u8868\u793a\u3059\u308b\u79d2\u6570\u304c\u975e\u5e38\u306b\u5c0f\u3055\u304b\u3063\u305f\u305f\u3081\u6307\u6570\u8868\u8a18\u306b\u306a\u3063\u305f\u3068\u601d\u308f\u308c\u308b\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3060\u304c\u4ee5\u4e0b\u3092\u5b9f\u884c\u3059\u308b\u3068\u300c1.0E-6\u300d\u304c\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">&lt;?php\r\n$test = 0.000001;\r\necho $test;<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n<h3>\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">#number_format\u3092\u4f7f\u7528\u3059\u308b\u30d1\u30bf\u30fc\u30f3\r\n$test = 0.000001;\r\n$test = number_format($test, 10);\r\necho $test; \/\/0.0000010000\r\n\r\n#sprintf\u3092\u4f7f\u7528\u3059\u308b\u30d1\u30bf\u30fc\u30f3\r\n$test = 0.000001;\r\n$test = sprintf('%F', floatval($test));\r\necho $test; \/\/0.000001<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u6240\u611f<\/h2>\n<p>\u30a8\u30af\u30bb\u30eb\u3067\u3082\u6841\u6570\u306e\u591a\u3044\u6570\u5024\u3092\u5165\u529b\u3057\u305f\u5834\u5408\u300cE+\u3007\u300d\u307f\u305f\u3044\u306a\u8868\u793a\u306b\u81ea\u52d5\u3067\u5909\u66f4\u3055\u308c\u308b\u304c\u3053\u308c\u3082\u540c\u3058\u554f\u984c\u307f\u305f\u3044\u3002\u3061\u306a\u307f\u306b\u30a8\u30af\u30bb\u30eb\u3060\u3068\u300c\u5217\u306e\u30ab\u30e9\u30e0\u90e8\u5206(A\u5217\u7b49)\u3092\u53f3\u30af\u30ea\u30c3\u30af\u2192\u30bb\u30eb\u306e\u66f8\u5f0f\u5909\u63db\u2192\u8868\u793a\u5f62\u5f0f\u3092\u6a19\u6e96\u304b\u3089\u6570\u5024\u306b\u5909\u66f4\u300d\u3067\u89e3\u6c7a\u3067\u304d\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u3067\u904e\u53bb\u8a18\u4e8b\u3092\u53c2\u8003\u306e\u4e0a\u3001\u3042\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u51e6\u7406\u306b\u304b\u304b\u3063\u305f\u6642\u9593\u3092\u6e2c\u5b9a\u3057\u3088\u3046\u3068\u3057\u305f ... <\/p>\n","protected":false},"author":1,"featured_media":1085,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-6757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/6757","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/comments?post=6757"}],"version-history":[{"count":1,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/6757\/revisions"}],"predecessor-version":[{"id":6759,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/6757\/revisions\/6759"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/media\/1085"}],"wp:attachment":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/media?parent=6757"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/categories?post=6757"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/tags?post=6757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}