{"id":217844,"date":"2023-12-23T01:12:24","date_gmt":"2023-12-22T17:12:24","guid":{"rendered":"https:\/\/www.idc.net\/help\/217844\/"},"modified":"2023-12-23T01:12:24","modified_gmt":"2023-12-22T17:12:24","slug":"php%e5%87%bd%e6%95%b0%ef%bc%9asqrt","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217844\/","title":{"rendered":"PHP\u51fd\u6570\uff1asqrt"},"content":{"rendered":"<h1 id=\"php%e5%87%bd%e6%95%b0%ef%bc%9asqrt-NWTSAsuOBo\">PHP\u51fd\u6570\uff1asqrt<\/h1>\n<p>\u5728PHP\u4e2d\uff0csqrt()\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u4e00\u4e2a\u6570\u7684\u5e73\u65b9\u6839\u3002\u5b83\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570\uff0c\u5373\u8981\u8ba1\u7b97\u5e73\u65b9\u6839\u7684\u6570\u503c\uff0c\u5e76\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-NWTSAsuOBo\">\u8bed\u6cd5<\/h2>\n<p>sqrt()\u51fd\u6570\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>sqrt(number)\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0cnumber\u662f\u8981\u8ba1\u7b97\u5e73\u65b9\u6839\u7684\u6570\u503c\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-NWTSAsuOBo\">\u793a\u4f8b<\/h2>\n<p>\u4e0b\u9762\u662f\u4e00\u4e9b\u4f7f\u7528sqrt()\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>&lt;?php\n    $num1 = 16;\n    $result1 = sqrt($num1);\n    echo \"16\u7684\u5e73\u65b9\u6839\u662f\uff1a\" . $result1 . \"&lt;br&gt;\";\n\n    $num2 = 25;\n    $result2 = sqrt($num2);\n    echo \"25\u7684\u5e73\u65b9\u6839\u662f\uff1a\" . $result2 . \"&lt;br&gt;\";\n\n    $num3 = 10;\n    $result3 = sqrt($num3);\n    echo \"10\u7684\u5e73\u65b9\u6839\u662f\uff1a\" . $result3 . \"&lt;br&gt;\";\n?&gt;\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre><code>16\u7684\u5e73\u65b9\u6839\u662f\uff1a4\n25\u7684\u5e73\u65b9\u6839\u662f\uff1a5\n10\u7684\u5e73\u65b9\u6839\u662f\uff1a3.1622776601684\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86sqrt()\u51fd\u6570\u6765\u8ba1\u7b97\u4e0d\u540c\u6570\u503c\u7684\u5e73\u65b9\u6839\uff0c\u5e76\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-NWTSAsuOBo\">\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u5728\u4f7f\u7528sqrt()\u51fd\u6570\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>sqrt()\u51fd\u6570\u53ea\u80fd\u7528\u4e8e\u8ba1\u7b97\u975e\u8d1f\u6570\u7684\u5e73\u65b9\u6839\u3002\u5982\u679c\u4f20\u9012\u7ed9\u51fd\u6570\u7684\u53c2\u6570\u662f\u8d1f\u6570\uff0c\u5c06\u4f1a\u8fd4\u56deNaN\uff08Not a Number\uff09\u3002<\/li>\n<li>sqrt()\u51fd\u6570\u8fd4\u56de\u7684\u7ed3\u679c\u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%bb%93%e8%ae%ba-NWTSAsuOBo\">\u7ed3\u8bba<\/h2>\n<p>sqrt()\u51fd\u6570\u662fPHP\u4e2d\u7528\u4e8e\u8ba1\u7b97\u5e73\u65b9\u6839\u7684\u51fd\u6570\u3002\u5b83\u975e\u5e38\u7b80\u5355\u6613\u7528\uff0c\u53ea\u9700\u8981\u4f20\u9012\u4e00\u4e2a\u53c2\u6570\u5373\u53ef\u3002\u901a\u8fc7\u4f7f\u7528sqrt()\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u8ba1\u7b97\u4efb\u610f\u6570\u503c\u7684\u5e73\u65b9\u6839\u3002<\/p>\n<h3 id=\"%e9%a6%99%e6%b8%af%e6%9c%8d%e5%8a%a1%e5%99%a8%e9%a6%96%e9%80%89%e5%90%8e%e6%b5%aa%e4%ba%91-NWTSAsuOBo\">\u9999\u6e2f\u670d\u52a1\u5668\u9996\u9009\u540e\u6d6a\u4e91<\/h3>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u53ef\u9760\u7684\u9999\u6e2f\u670d\u52a1\u5668\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u6211\u4eec\u63d0\u4f9b\u9ad8\u6027\u80fd\u7684\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u4ee5\u6ee1\u8db3\u60a8\u7684\u5404\u79cd\u9700\u6c42\u3002\u65e0\u8bba\u60a8\u662f\u4e2a\u4eba\u7528\u6237\u8fd8\u662f\u4f01\u4e1a\u7528\u6237\uff0c\u6211\u4eec\u90fd\u6709\u9002\u5408\u60a8\u7684\u89e3\u51b3\u65b9\u6848\u3002\u8bf7\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\uff1asqrt \u5728PHP\u4e2d\uff0csqrt()\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u4e00\u4e2a\u6570\u7684\u5e73\u65b9\u6839\u3002\u5b83\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570\uff0c\u5373\u8981\u8ba1\u7b97\u5e73\u65b9\u6839\u7684\u6570\u503c [&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-217844","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217844","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=217844"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217844\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217844"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217844"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}