{"id":217854,"date":"2023-12-23T01:22:24","date_gmt":"2023-12-22T17:22:24","guid":{"rendered":"https:\/\/www.idc.net\/help\/217854\/"},"modified":"2023-12-23T01:22:24","modified_gmt":"2023-12-22T17:22:24","slug":"php%e5%87%bd%e6%95%b0%ef%bc%9aexp","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217854\/","title":{"rendered":"PHP\u51fd\u6570\uff1aexp"},"content":{"rendered":"<h1 id=\"php%e5%87%bd%e6%95%b0%ef%bc%9aexp-QdBdbAeeLl\">PHP\u51fd\u6570\uff1aexp<\/h1>\n<p>\u5728PHP\u4e2d\uff0cexp()\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u6307\u6570\u51fd\u6570\u7684\u503c\u3002\u6307\u6570\u51fd\u6570\u662f\u4ee5\u5e38\u6570e\u4e3a\u5e95\u7684\u5e42\u51fd\u6570\uff0c\u5176\u4e2de\u662f\u81ea\u7136\u5bf9\u6570\u7684\u5e95\u6570\uff0c\u7ea6\u7b49\u4e8e2.71828\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-QdBdbAeeLl\">\u8bed\u6cd5<\/h2>\n<p>exp(x)<\/p>\n<h2 id=\"%e5%8f%82%e6%95%b0-QdBdbAeeLl\">\u53c2\u6570<\/h2>\n<p>x\uff1a\u5fc5\u9700\uff0c\u6307\u5b9a\u6307\u6570\u51fd\u6570\u7684\u6307\u6570\u503c\u3002<\/p>\n<h2 id=\"%e8%bf%94%e5%9b%9e%e5%80%bc-QdBdbAeeLl\">\u8fd4\u56de\u503c<\/h2>\n<p>exp()\u51fd\u6570\u8fd4\u56dee\u7684x\u6b21\u5e42\u7684\u503c\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-QdBdbAeeLl\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528exp()\u51fd\u6570\uff1a<\/p>\n<pre><code>&lt;?php\n$x = 2;\n$result = exp($x);\necho \"exp($x)\u7684\u503c\u662f\uff1a\" . $result;\n?&gt;\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre><code>exp(2)\u7684\u503c\u662f\uff1a7.3890560989307\n<\/code><\/pre>\n<h2 id=\"%e8%af%b4%e6%98%8e-QdBdbAeeLl\">\u8bf4\u660e<\/h2>\n<p>exp()\u51fd\u6570\u662f\u4e00\u4e2a\u6570\u5b66\u51fd\u6570\uff0c\u7528\u4e8e\u8ba1\u7b97\u6307\u6570\u51fd\u6570\u7684\u503c\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u5404\u79cd\u6570\u5b66\u548c\u79d1\u5b66\u8ba1\u7b97\u4e2d\uff0c\u4f8b\u5982\u8ba1\u7b97\u590d\u5229\u3001\u6307\u6570\u589e\u957f\u7b49\u3002<\/p>\n<p>exp()\u51fd\u6570\u7684\u53c2\u6570x\u53ef\u4ee5\u662f\u4efb\u4f55\u6570\u5b57\uff0c\u5305\u62ec\u6b63\u6570\u3001\u8d1f\u6570\u548c\u96f6\u3002\u5982\u679cx\u662f\u6b63\u6570\uff0c\u5219\u8fd4\u56dee\u7684x\u6b21\u5e42\u7684\u503c\uff1b\u5982\u679cx\u662f\u8d1f\u6570\uff0c\u5219\u8fd4\u56de1\u9664\u4ee5e\u7684-x\u6b21\u5e42\u7684\u503c\uff1b\u5982\u679cx\u662f\u96f6\uff0c\u5219\u8fd4\u56de1\u3002<\/p>\n<p>exp()\u51fd\u6570\u8fd4\u56de\u7684\u7ed3\u679c\u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9-QdBdbAeeLl\">\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u5728\u4f7f\u7528exp()\u51fd\u6570\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>exp()\u51fd\u6570\u7684\u53c2\u6570\u5fc5\u987b\u662f\u6570\u5b57\uff0c\u5426\u5219\u4f1a\u8fd4\u56de\u4e00\u4e2a\u8b66\u544a\u3002<\/li>\n<li>exp()\u51fd\u6570\u8fd4\u56de\u7684\u7ed3\u679c\u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\uff0c\u5982\u679c\u9700\u8981\u4f7f\u7528\u6574\u6570\u7ed3\u679c\uff0c\u53ef\u4ee5\u4f7f\u7528intval()\u51fd\u6570\u5c06\u6d6e\u70b9\u6570\u8f6c\u6362\u4e3a\u6574\u6570\u3002<\/li>\n<li>exp()\u51fd\u6570\u7684\u8ba1\u7b97\u7ed3\u679c\u53ef\u80fd\u4f1a\u975e\u5e38\u5927\u6216\u975e\u5e38\u5c0f\uff0c\u8d85\u51fa\u6d6e\u70b9\u6570\u7684\u8868\u793a\u8303\u56f4\u3002\u5728\u8fdb\u884c\u8ba1\u7b97\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u7ed3\u679c\u7684\u7cbe\u5ea6\u548c\u6ea2\u51fa\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%80%bb%e7%bb%93-QdBdbAeeLl\">\u603b\u7ed3<\/h2>\n<p>exp()\u51fd\u6570\u662fPHP\u4e2d\u7528\u4e8e\u8ba1\u7b97\u6307\u6570\u51fd\u6570\u7684\u51fd\u6570\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u5404\u79cd\u6570\u5b66\u548c\u79d1\u5b66\u8ba1\u7b97\u4e2d\uff0c\u4f8b\u5982\u8ba1\u7b97\u590d\u5229\u3001\u6307\u6570\u589e\u957f\u7b49\u3002\u4f7f\u7528exp()\u51fd\u6570\u53ef\u4ee5\u65b9\u4fbf\u5730\u8ba1\u7b97\u6307\u6570\u51fd\u6570\u7684\u503c\uff0c\u63d0\u9ad8\u8ba1\u7b97\u7684\u51c6\u786e\u6027\u548c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u4e00\u4e2a\u53ef\u9760\u7684\u4e91\u8ba1\u7b97\u670d\u52a1\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u6211\u4eec\u63d0\u4f9b\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u548c\u4e91\u670d\u52a1\u5668\u7b49\u591a\u79cd\u4ea7\u54c1\uff0c\u6ee1\u8db3\u60a8\u7684\u4e0d\u540c\u9700\u6c42\u3002\u60a8\u53ef\u4ee5\u8bbf\u95ee\u6211\u4eec\u7684\u5b98\u7f51\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff1a<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP\u51fd\u6570\uff1aexp \u5728PHP\u4e2d\uff0cexp()\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u6307\u6570\u51fd\u6570\u7684\u503c\u3002\u6307\u6570\u51fd\u6570\u662f\u4ee5\u5e38\u6570e\u4e3a\u5e95\u7684\u5e42\u51fd\u6570\uff0c\u5176\u4e2de\u662f\u81ea [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[197851],"tags":[],"class_list":["post-217854","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217854","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=217854"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217854\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217854"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217854"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217854"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}