{"id":217852,"date":"2023-12-23T01:20:24","date_gmt":"2023-12-22T17:20:24","guid":{"rendered":"https:\/\/www.idc.net\/help\/217852\/"},"modified":"2023-12-23T01:20:24","modified_gmt":"2023-12-22T17:20:24","slug":"php%e5%87%bd%e6%95%b0%ef%bc%9ais_nan","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217852\/","title":{"rendered":"PHP\u51fd\u6570\uff1ais_nan"},"content":{"rendered":"<p><title id=\"php%e5%87%bd%e6%95%b0%ef%bc%9ais_nan-XiqSvmBDCP\">PHP\u51fd\u6570\uff1ais_nan<\/title><\/p>\n<h1 id=\"php%e5%87%bd%e6%95%b0%ef%bc%9ais_nan-XiqSvmBDCP\">PHP\u51fd\u6570\uff1ais_nan<\/h1>\n<p>\u5728PHP\u4e2d\uff0cis_nan()\u51fd\u6570\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u975e\u6570\u5b57\uff08NaN\uff09\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-XiqSvmBDCP\">\u8bed\u6cd5<\/h2>\n<p>is_nan(value)<\/p>\n<h2 id=\"%e5%8f%82%e6%95%b0-XiqSvmBDCP\">\u53c2\u6570<\/h2>\n<p>value\uff1a\u8981\u68c0\u67e5\u7684\u503c\u3002<\/p>\n<h2 id=\"%e8%bf%94%e5%9b%9e%e5%80%bc-XiqSvmBDCP\">\u8fd4\u56de\u503c<\/h2>\n<p>\u5982\u679c\u7ed9\u5b9a\u7684\u503c\u662f\u975e\u6570\u5b57\uff08NaN\uff09\uff0c\u5219\u8fd4\u56detrue\uff0c\u5426\u5219\u8fd4\u56defalse\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-XiqSvmBDCP\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86is_nan()\u51fd\u6570\u7684\u4f7f\u7528\uff1a<\/p>\n<pre>\n<code>\n\n<\/code>\n<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c$number1\u662f\u4e00\u4e2a\u6570\u5b57\uff0c\u6240\u4ee5is_nan($number1)\u8fd4\u56defalse\u3002\u800c$number2\u662facos(8)\u7684\u7ed3\u679c\uff0cacos()\u51fd\u6570\u8fd4\u56de\u7684\u662f\u975e\u6570\u5b57\uff08NaN\uff09\uff0c\u6240\u4ee5is_nan($number2)\u8fd4\u56detrue\u3002<\/p>\n<h2 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[&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-217852","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217852","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=217852"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217852\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}