{"id":217862,"date":"2023-12-23T01:30:24","date_gmt":"2023-12-22T17:30:24","guid":{"rendered":"https:\/\/www.idc.net\/help\/217862\/"},"modified":"2023-12-23T01:30:24","modified_gmt":"2023-12-22T17:30:24","slug":"php%e5%87%bd%e6%95%b0%ef%bc%9aasin","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217862\/","title":{"rendered":"PHP\u51fd\u6570\uff1aasin"},"content":{"rendered":"<h1 id=\"php%e5%87%bd%e6%95%b0%ef%bc%9aasin-tITFpZrgXe\">PHP\u51fd\u6570\uff1aasin<\/h1>\n<p>\u5728PHP\u4e2d\uff0casin\u51fd\u6570\u662f\u4e00\u4e2a\u7528\u4e8e\u8ba1\u7b97\u53cd\u6b63\u5f26\u503c\u7684\u6570\u5b66\u51fd\u6570\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u4ecb\u4e8e-\u03c0\/2\u548c\u03c0\/2\u4e4b\u95f4\u7684\u89d2\u5ea6\uff0c\u8868\u793a\u7ed9\u5b9a\u6570\u5b57\u7684\u53cd\u6b63\u5f26\u503c\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-tITFpZrgXe\">\u8bed\u6cd5<\/h2>\n<p>asin\u51fd\u6570\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>asin(number)\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0cnumber\u662f\u8981\u8ba1\u7b97\u53cd\u6b63\u5f26\u503c\u7684\u6570\u5b57\u3002<\/p>\n<h2 id=\"%e5%8f%82%e6%95%b0-tITFpZrgXe\">\u53c2\u6570<\/h2>\n<p>asin\u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570\uff1a<\/p>\n<ul>\n<li><strong>number<\/strong>: \u5fc5\u9700\u3002\u8981\u8ba1\u7b97\u53cd\u6b63\u5f26\u503c\u7684\u6570\u5b57\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%bf%94%e5%9b%9e%e5%80%bc-tITFpZrgXe\">\u8fd4\u56de\u503c<\/h2>\n<p>asin\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u4ecb\u4e8e-\u03c0\/2\u548c\u03c0\/2\u4e4b\u95f4\u7684\u89d2\u5ea6\uff0c\u8868\u793a\u7ed9\u5b9a\u6570\u5b57\u7684\u53cd\u6b63\u5f26\u503c\u3002\u8fd4\u56de\u503c\u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-tITFpZrgXe\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528asin\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>&lt;?php\n$number = 0.5;\n$asinValue = asin($number);\necho \"\u53cd\u6b63\u5f26\u503c\u4e3a\uff1a\" . $asinValue;\n?&gt;\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre><code>\u53cd\u6b63\u5f26\u503c\u4e3a\uff1a0.5235987755983\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u8ba1\u7b97\u4e86\u6570\u5b570.5\u7684\u53cd\u6b63\u5f26\u503c\uff0c\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728\u53d8\u91cf$asinValue\u4e2d\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528echo\u8bed\u53e5\u5c06\u7ed3\u679c\u8f93\u51fa\u5230\u5c4f\u5e55\u4e0a\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9-tITFpZrgXe\">\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u5728\u4f7f\u7528asin\u51fd\u6570\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>\u53c2\u6570number\u7684\u53d6\u503c\u8303\u56f4\u5e94\u5728-1\u52301\u4e4b\u95f4\uff0c\u5426\u5219\u4f1a\u8fd4\u56deNaN\uff08\u975e\u6570\u5b57\uff09\u3002<\/li>\n<li>\u8fd4\u56de\u7684\u89d2\u5ea6\u503c\u662f\u4ee5\u5f27\u5ea6\u4e3a\u5355\u4f4d\u7684\uff0c\u5982\u679c\u9700\u8981\u5c06\u5176\u8f6c\u6362\u4e3a\u5ea6\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528rad2deg\u51fd\u6570\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%80%bb%e7%bb%93-tITFpZrgXe\">\u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7asin\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u8ba1\u7b97\u7ed9\u5b9a\u6570\u5b57\u7684\u53cd\u6b63\u5f26\u503c\u3002\u5b83\u5728\u6570\u5b66\u8ba1\u7b97\u548c\u51e0\u4f55\u8fd0\u7b97\u4e2d\u975e\u5e38\u6709\u7528\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\u4ee5\u6ee1\u8db3\u4e0d\u540c\u7528\u6237\u7684\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\uff1aasin \u5728PHP\u4e2d\uff0casin\u51fd\u6570\u662f\u4e00\u4e2a\u7528\u4e8e\u8ba1\u7b97\u53cd\u6b63\u5f26\u503c\u7684\u6570\u5b66\u51fd\u6570\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a\u4ecb\u4e8e-\u03c0\/2\u548c\u03c0\/2 [&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-217862","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217862","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=217862"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217862\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}