{"id":217851,"date":"2023-12-23T01:19:22","date_gmt":"2023-12-22T17:19:22","guid":{"rendered":"https:\/\/www.idc.net\/help\/217851\/"},"modified":"2023-12-23T01:19:22","modified_gmt":"2023-12-22T17:19:22","slug":"php%e5%87%bd%e6%95%b0%ef%bc%9ais_infinite","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217851\/","title":{"rendered":"PHP\u51fd\u6570\uff1ais_infinite"},"content":{"rendered":"<p><title id=\"php%e5%87%bd%e6%95%b0%ef%bc%9ais_infinite-rsdMdsstZO\">PHP\u51fd\u6570\uff1ais_infinite<\/title><\/p>\n<h1 id=\"php%e5%87%bd%e6%95%b0%ef%bc%9ais_infinite-rsdMdsstZO\">PHP\u51fd\u6570\uff1ais_infinite<\/h1>\n<p>\u5728PHP\u4e2d\uff0cis_infinite()\u51fd\u6570\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u65e0\u7a77\u5927\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-rsdMdsstZO\">\u8bed\u6cd5<\/h2>\n<p>is_infinite(value)<\/p>\n<h2 id=\"%e5%8f%82%e6%95%b0-rsdMdsstZO\">\u53c2\u6570<\/h2>\n<p>value: \u5fc5\u9700\uff0c\u8981\u68c0\u67e5\u7684\u503c\u3002<\/p>\n<h2 id=\"%e8%bf%94%e5%9b%9e%e5%80%bc-rsdMdsstZO\">\u8fd4\u56de\u503c<\/h2>\n<p>\u5982\u679c\u503c\u4e3a\u6b63\u65e0\u7a77\u5927\u6216\u8d1f\u65e0\u7a77\u5927\uff0c\u5219\u8fd4\u56detrue\uff0c\u5426\u5219\u8fd4\u56defalse\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-rsdMdsstZO\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86is_infinite()\u51fd\u6570\u7684\u4f7f\u7528\uff1a<\/p>\n<pre>\n<code>\n&lt;?php\n$number1 = 10;\n$number2 = INF;\n$number3 = -INF;\n\nvar_dump(is_infinite($number1)); \/\/ \u8f93\u51fa: bool(false)\nvar_dump(is_infinite($number2)); \/\/ \u8f93\u51fa: bool(true)\nvar_dump(is_infinite($number3)); \/\/ \u8f93\u51fa: bool(true)\n?&gt;\n<\/code>\n<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e09\u4e2a\u53d8\u91cf$number1\uff0c$number2\u548c$number3\u3002$number1\u662f\u4e00\u4e2a\u666e\u901a\u7684\u6709\u9650\u6570\u503c\uff0c$number2\u662f\u6b63\u65e0\u7a77\u5927\uff0c$number3\u662f\u8d1f\u65e0\u7a77\u5927\u3002<\/p>\n<p>\u901a\u8fc7\u8c03\u7528is_infinite()\u51fd\u6570\u5e76\u4f20\u9012\u8fd9\u4e9b\u53d8\u91cf\u4f5c\u4e3a\u53c2\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230$is_infinite($number1)\u8fd4\u56defalse\uff0c\u56e0\u4e3a$number1\u662f\u6709\u9650\u6570\u503c\uff0c\u800c$is_infinite($number2)\u548c$is_infinite($number3)\u90fd\u8fd4\u56detrue\uff0c\u56e0\u4e3a$number2\u548c$number3\u90fd\u662f\u65e0\u7a77\u5927\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-rsdMdsstZO\">\u603b\u7ed3<\/h2>\n<p>is_infinite()\u51fd\u6570\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684PHP\u51fd\u6570\uff0c\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u503c\u662f\u5426\u4e3a\u65e0\u7a77\u5927\u3002\u5b83\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5728\u5904\u7406\u6570\u503c\u65f6\u8fdb\u884c\u6709\u6548\u7684\u9519\u8bef\u68c0\u67e5\u548c\u5904\u7406\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u53ef\u9760\u7684PHP\u4e3b\u673a\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\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\uff1ais_infinite PHP\u51fd\u6570\uff1ais_infinite \u5728PHP\u4e2d\uff0cis_infinite() [&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-217851","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217851","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=217851"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217851\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}