{"id":47188,"date":"2024-12-02T12:38:39","date_gmt":"2024-12-02T04:38:39","guid":{"rendered":"https:\/\/fwq.ai\/blog\/47188\/"},"modified":"2024-12-02T12:38:39","modified_gmt":"2024-12-02T04:38:39","slug":"php-%e5%87%bd%e6%95%b0%e4%b8%ad%e5%93%aa%e4%ba%9b%e5%8f%98%e9%87%8f%e7%b1%bb%e5%9e%8b%e5%8f%af%e4%bb%a5%e5%ad%98%e5%82%a8%e6%b5%ae%e7%82%b9%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/47188\/","title":{"rendered":"PHP \u51fd\u6570\u4e2d\u54ea\u4e9b\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u6d6e\u70b9\u6570\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

PHP \u51fd\u6570\u4e2d\u54ea\u4e9b\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u6d6e\u70b9\u6570\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u300aPHP \u51fd\u6570\u4e2d\u54ea\u4e9b\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u6d6e\u70b9\u6570\uff1f\u300b<\/span>\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u6587\u7ae0<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

PHP \u4e2d\u5b58\u50a8\u6d6e\u70b9\u6570\u7684\u53d8\u91cf\u7c7b\u578b\u6709\uff1a1. float\uff08\u5355\u7cbe\u5ea6\uff09\uff1b2. double\uff08\u53cc\u7cbe\u5ea6\uff09\uff1b\u540e\u8005\u7cbe\u5ea6\u66f4\u9ad8\uff0c\u5bf9\u4e8e\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u63a8\u8350\u4f7f\u7528 double \u7c7b\u578b\uff0c\u5e76\u901a\u8fc7 (float) \u6216 (double) \u5f3a\u5236\u8f6c\u6362\u6307\u5b9a\u53d8\u91cf\u7c7b\u578b\u3002<\/p>\n

\"PHP<\/p>\n

PHP \u51fd\u6570\u4e2d\u5b58\u50a8\u6d6e\u70b9\u6570\u7684\u53d8\u91cf\u7c7b\u578b<\/strong><\/p>\n

\u5728 PHP \u4e2d\uff0c\u6d6e\u70b9\u6570\uff08\u6d6e\u70b9\u578b\u6570\u5b57\uff09\u53ef\u4ee5\u5b58\u50a8\u5728\u4e24\u79cd\u53d8\u91cf\u7c7b\u578b\u4e2d\uff1a<\/p>\n

    \n
  1. float<\/strong>\uff1a\u7528\u4e8e\u5b58\u50a8\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3002<\/li>\n
  2. double<\/strong>\uff1a\u7528\u4e8e\u5b58\u50a8\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff0c\u7cbe\u5ea6\u66f4\u9ad8\u3002<\/li>\n<\/ol>\n

    \u8bed\u6cd5\uff1a<\/strong><\/p>\n

    $float_variable = (float) 12.34;\n$double_variable = (double) 12.34;<\/pre>\n
    \u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n
    \u8ba1\u7b97\u5706\u7684\u9762\u79ef\uff0c\u5176\u4e2d $radius<\/code> \u662f\u534a\u5f84\u503c\uff1a<\/p>\n
    $radius = 5;\n$area = (double) $radius * $radius * 3.14;\necho \"\u5706\u7684\u9762\u79ef\uff1a{$area}\";<\/pre>\n
    \u6ce8\u610f\uff1a<\/strong><\/p>\n
      \n
    • float<\/code> \u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u7684\u7cbe\u5ea6\u7ea6\u4e3a 6-7 \u4f4d\u6709\u6548\u6570\u5b57\uff0c\u800c double<\/code> \u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u7684\u7cbe\u5ea6\u7ea6\u4e3a 15-16 \u4f4d\u6709\u6548\u6570\u5b57\u3002<\/li>\n
    • \u5bf9\u4e8e\u9700\u8981\u8f83\u9ad8\u7cbe\u5ea6\u7684\u8ba1\u7b97\uff0c\u5efa\u8bae\u4f7f\u7528 double<\/code> \u7c7b\u578b\u3002<\/li>\n
    • \u4f7f\u7528 (float)<\/code> \u6216 (double)<\/code> \u5f3a\u5236\u8f6c\u6362\u65f6\uff0cPHP \u4f1a\u5c1d\u8bd5\u5c06\u53d8\u91cf\u503c\u8f6c\u6362\u4e3a\u76f8\u5e94\u7684\u7c7b\u578b\u3002\u5982\u679c\u8f6c\u6362\u5931\u8d25\uff0c\u5c06\u5f15\u53d1\u4e00\u4e2a TypeError<\/code> \u5f02\u5e38\u3002<\/li>\n<\/ul>\n
      \u4eca\u5929\u5173\u4e8e\u300aPHP \u51fd\u6570\u4e2d\u54ea\u4e9b\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u6d6e\u70b9\u6570\uff1f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u6d6e\u70b9\u6570,\u53d8\u91cf\u7c7b\u578b\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      PHP \u51fd\u6570\u4e2d\u54ea\u4e9b\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u6d6e\u70b9\u6570\uff1f \u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u300aPHP \u51fd\u6570\u4e2d\u54ea\u4e9b\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u6d6e\u70b9\u6570\uff1f\u300b\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u6587\u7ae0\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~ PHP \u4e2d\u5b58\u50a8\u6d6e\u70b9\u6570\u7684\u53d8\u91cf\u7c7b\u578b\u6709\uff1a1. float\uff08\u5355\u7cbe\u5ea6\uff09\uff1b2. double\uff08\u53cc\u7cbe\u5ea6\uff09\uff1b\u540e\u8005\u7cbe\u5ea6\u66f4\u9ad8\uff0c\u5bf9\u4e8e\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u63a8\u8350\u4f7f\u7528 double \u7c7b\u578b\uff0c\u5e76\u901a\u8fc7 (float) \u6216 (double) \u5f3a\u5236\u8f6c\u6362\u6307\u5b9a\u53d8\u91cf\u7c7b\u578b\u3002 PHP \u51fd\u6570\u4e2d\u5b58\u50a8\u6d6e\u70b9\u6570\u7684\u53d8\u91cf\u7c7b\u578b \u5728 PHP \u4e2d\uff0c\u6d6e\u70b9\u6570\uff08\u6d6e\u70b9\u578b\u6570\u5b57\uff09\u53ef\u4ee5\u5b58\u50a8\u5728\u4e24\u79cd\u53d8\u91cf\u7c7b\u578b\u4e2d\uff1a float\uff1a\u7528\u4e8e\u5b58\u50a8\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3002 double\uff1a\u7528\u4e8e\u5b58\u50a8\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff0c\u7cbe\u5ea6\u66f4\u9ad8\u3002 \u8bed\u6cd5\uff1a $float_variable = (float) 12.34; $double_variable = (double) 12.34; \u5b9e\u6218\u6848\u4f8b\uff1a \u8ba1\u7b97\u5706\u7684\u9762\u79ef\uff0c\u5176\u4e2d $radius \u662f\u534a\u5f84\u503c\uff1a $radius = 5; $area = (double) $radius * $radius * 3.14; echo “\u5706\u7684\u9762\u79ef\uff1a{$area}”; \u6ce8\u610f\uff1a float \u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u7684\u7cbe\u5ea6\u7ea6\u4e3a 6-7 \u4f4d\u6709\u6548\u6570\u5b57\uff0c\u800c double \u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u7684\u7cbe\u5ea6\u7ea6\u4e3a 15-16 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-47188","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/47188","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=47188"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/47188\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=47188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=47188"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=47188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}