{"id":6219,"date":"2021-01-10T11:14:29","date_gmt":"2021-01-10T11:14:29","guid":{"rendered":"https:\/\/blog.gwlin.com\/?p=6219"},"modified":"2023-04-01T23:34:43","modified_gmt":"2023-04-01T15:34:43","slug":"php-%e5%88%a9%e7%94%a8-php_float_epsilon-%e6%b5%ae%e7%82%b9%e6%95%b0%e6%af%94%e8%be%83%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.gwlin.com\/blog\/posts\/6219","title":{"rendered":"php \u5229\u7528 PHP_FLOAT_EPSILON  \u6d6e\u70b9\u6570\u6bd4\u8f83\u95ee\u9898"},"content":{"rendered":"\n<p>\u5728\u5904\u7406\u57fa\u91d1\u6570\u636e\u7684\u65f6\u5019\u53d1\u73b0\u4e00\u4e2abug\uff1a\u60f3\u6cd5\u662f\u5f53amout\u5c0f\u4e8e\u7b49\u4e8e0\u7684\u65f6\u5019\u8df3\u51fa\u5faa\u73af\uff0c\u4ee3\u7801\u50cf\u8fd9\u6837\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" > if($amount&lt;=self::EPSILON){ \/\/ $amount&lt;=0\r\n    break;\r\n }<\/code><\/pre>\n\n\n\n<p>\u5f88\u7b80\u5355\u7684\u903b\u8f91\u3002\u4f46\u5b9e\u9645\u6d4b\u8bd5\u53d1\u73b0\u6709\u65f6\u5e76\u6ca1\u6709break\uff0c\u628a\u6570\u636e\u6253\u5370\u51fa\u6765\u540e\u6ce8\u610f\u5230amount\u662f\u4e00\u4e2a\u5f88\u5c0f\u7684\u6570\u3002\u7b2c\u4e00\u53cd\u5e94\u5e94\u8be5\u662f\u6d6e\u70b9\u6570\u95ee\u9898\uff0c\u89e3\u51b3\u65b9\u6cd5\u4e5f\u5f88\u7b80\u5355\u76f4\u63a5\uff1a\u628a0\u6362\u6210\u4e00\u4e2a\u8db3\u591f\u5c0f\u7684\u6570\uff0c\u4f8b\u59820.00001\u6216\u8005\u7528PHP\u5185\u7f6e\u7684\u6700\u5c0f\u6d6e\u70b9\u6570\u5e38\u91cfPHP_FLOAT_EPSILON\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u628a0\u6362\u6210\u4e00\u4e2a\u8db3\u591f\u5c0f\u7684\u6570\uff0c\u4f8b\u59820.00001\u6216\u8005\u7528PHP\u5185\u7f6e\u7684\u6700\u5c0f\u6d6e\u70b9\u6570\u5e38\u91cfPHP_FLOAT_EPSILON<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[179],"tags":[],"class_list":["post-6219","post","type-post","status-publish","format-standard","hentry","category-notes"],"_links":{"self":[{"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/posts\/6219","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/comments?post=6219"}],"version-history":[{"count":1,"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/posts\/6219\/revisions"}],"predecessor-version":[{"id":42921,"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/posts\/6219\/revisions\/42921"}],"wp:attachment":[{"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/media?parent=6219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/categories?post=6219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gwlin.com\/blog\/wp-json\/wp\/v2\/tags?post=6219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}