{"id":30315,"date":"2023-05-25T10:27:14","date_gmt":"2023-04-20T06:14:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/"},"modified":"2025-08-12T18:35:41","modified_gmt":"2025-08-12T10:35:41","slug":"php%e7%9a%84%e5%b8%b8%e9%87%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/","title":{"rendered":"PHP\u7684\u5e38\u91cf"},"content":{"rendered":"

\u6211\u5e76\u4e0d\u662f\u8981\u6c42\u4e00\u79cd\u7ffb\u8bd1\u65b9\u6848\uff0c\u800c\u662f\u8bf7\u4f60\u76f4\u63a5\u7528\u4e2d\u6587\u91cd\u65b0\u8868\u8fbe\u6240\u63d0\u4f9b\u7684\u53e5\u5b50\u3002<\/p>\n

“\u5b9a\u6570” \u662f\u6307\u4e00\u4e2a\u56fa\u5b9a\u7684\u503c\u3002<\/h1>\n

\u5e38\u6570\u4e0e\u53d8\u91cf\u4e0d\u540c\uff0c\u5b83\u6307\u7684\u662f\u4e0d\u80fd\u5728\u4e2d\u95f4\u66f4\u6539\u5185\u5bb9\u7684\u5bb9\u5668\u3002
\n\u5728\u811a\u672c\u4e2d\uff0c\u5b83\u4e5f\u53ef\u4ee5\u88ab\u89e3\u91ca\u4e3a\u9884\u5148\u7ed9\u67d0\u4e9b\u6709\u610f\u4e49\u7684\u503c\u9644\u52a0\u503c\u7684\u673a\u5236\u3002<\/p>\n

const<\/span> TAX<\/span> =<\/span> 1.08<\/span>;<\/span>\r\n$price<\/span> =<\/span> 1000<\/span>;<\/span>\r\n$sum<\/span> =<\/span> $price<\/span> *<\/span> TAXs<\/span>;<\/span>\r\nprint<\/span> $sum<\/span>;<\/span>\r\n\/\/\u7d50\u679c\uff1a1000<\/span>\r\n<\/code><\/pre>\n
const\u662f\u4e00\u6761\u547d\u4ee4\uff0c\u7528\u4e8e\u58f0\u660e\u5e38\u91cf\u3002\u5728\u8fd9\u91cc\uff0c\u4f7f\u7528\u5e38\u91cfTAX\u4ee5\u503c1.08\u8fdb\u884c\u4e86\u8bbe\u7f6e\u3002<\/p>\n
const<\/span> \u5b9a\u6570\u540d<\/span> =<\/span> \u5024<\/span>\r\n<\/code><\/pre>\n
\u5b9a\u6570\u7684\u547d\u540d\u89c4\u5219\u4e0e\u53d8\u91cf\u7684\u547d\u540d\u89c4\u5219\u51e0\u4e4e\u76f8\u540c\uff0c\u4f46\u6709\u4ee5\u4e0b\u51e0\u70b9\u4e0d\u540c\u3002<\/p>\n
\u4e0d\u9700\u8981\u5728\u5f00\u5934\u52a0\u4e0a\u50cf”$”\u8fd9\u6837\u7684\u7b26\u53f7<\/h3>\n
\u4e0e\u53d8\u91cf\u4e00\u6837\uff0c\u7b2c\u4e00\u4e2a\u5b57\u7b26”$”\u662f\u4e0d\u5fc5\u8981\u7684\u3002\u5e38\u91cf\u4e0d\u5e94\u8be5\u547d\u540d\u4e3a”$TAX”\uff0c\u800c\u662f\u76f4\u63a5\u547d\u540d\u4e3a”TAX”\u3002<\/p>\n
2. \u4e0d\u662fPHP\u4e2d\u5177\u6709\u610f\u4e49\u7684\u4fdd\u7559\u5b57<\/h3>\n
\u8bf7\u4e0d\u8981\u4f7f\u7528\u5df2\u7ecf\u5728PHP\u4e2d\u539f\u672c\u4f5c\u4e3a\u5e38\u91cf\u5b9a\u4e49\u7684\u4fdd\u7559\u5b57\u3002<\/p>\n
\u5168\u90e8\u4f7f\u7528\u5927\u5199\u5b57\u6bcd\u8fdb\u884c\u547d\u540d\u3002<\/h3>\n
\u5728\u8bed\u6cd5\u89c4\u5219\u4e2d\u5e76\u4e0d\u8981\u6c42\uff0c\u4f46\u662f\u4e3a\u4e86\u4f7f\u5e38\u91cf\u4e0e\u53d8\u91cf\u5728\u89c6\u89c9\u4e0a\u66f4\u6613\u533a\u5206\uff0c\u6211\u4eec\u5c06\u6240\u6709\u5e38\u91cf\u4ee5\u5927\u5199\u5b57\u6bcd\u547d\u540d\u3002
\n\u547d\u540d\u89c4\u5219\u4f7f\u7528\u4e0b\u5212\u7ebf\u300c_\u300d\u8fdb\u884c\u5206\u9694\uff0c\u4f8b\u5982\u300cTAX_FREE\u300d\u3002<\/p>\n
\u7136\u800c\uff0c\u5982\u679c\u4f7f\u7528define\u8fdb\u884c\u5b9a\u4e49\uff0c\u65e0\u6cd5\u50cf\u4e0b\u9762\u8fd9\u6837\u4fee\u6539\u503c\u3002<\/p>\n
<?php<\/span>\r\ndefine<\/span>(<\/span>'TAX'<\/span>,<\/span> 1.08<\/span>);<\/span> \/\/ \u6d88\u8cbb\u7a0e<\/span>\r\ndefine<\/span>(<\/span>'TAX'<\/span>,<\/span> 1.10<\/span>);<\/span> \/\/ \u6d88\u8cbb\u7a0e\u3092\u5909\u66f4<\/span>\r\n\r\necho<\/span> TAX<\/span>;<\/span>\r\n\r\n<<\/span>\u5b9f\u884c\u7d50\u679c<\/span>><\/span>\r\nNotice<\/span>:<\/span> Constant<\/span> TAX<\/span> already<\/span> defined<\/span>\r\n1.08<\/span>\r\n<\/code><\/pre>\n
\u5df2\u5b9a\u4e49\u7684\u5e38\u91cf\u5217\u8868<\/h1>\n
PHP\u4ece\u4e00\u5f00\u59cb\u5c31\u51c6\u5907\u597d\u4e86<\/p>\n
\n
\u5b9a\u6570\u6982\u8981__FILE__\u5b9f\u884c\u4e2d\u306e\u30d5\u30a1\u30a4\u30eb\u540d(\u7d76\u5bfe\u30d1\u30b9)__DIR__\u5b9f\u884c\u4e2d\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3059\u308b\u30d5\u30a9\u30eb\u30c0__LINE__\u5b9f\u884c\u4e2d\u306e\u884c\u756a\u53f7__FUNCTION__\u5b9f\u884c\u4e2d\u306e\u95a2\u6570\u540d__CLASS__\u5b9f\u884c\u4e2d\u306e\u30af\u30e9\u30b9\u540d(\u6240\u5c5e\u3059\u308b\u540d\u524d\u7a7a\u9593\u542b\u3080)__METHOD__\u5b9f\u884c\u4e2d\u306e\u30e1\u30bd\u30c3\u30c9\u540d__TRAIT__\u5b9f\u884c\u4e2d\u306e\u30c8\u30ec\u30a4\u3068\u540d(\u6240\u5c5e\u3059\u308b\u540d\u524d\u533a\u9593\u542b\u3080)__NAMESPACE__\u73fe\u5728\u306e\u540d\u524d\u7a7a\u9593DIRECTORY_SEPARATOR\u30d5\u30a9\u30eb\u30c0\u533a\u5207\u308a\u6587\u5b57 windows\u300c\\\u300dlinux\u300c\/\u300dPATH_SEPARATOR\u30d1\u30b9\u533a\u5207\u308a\u6587\u5b57PHP_VERSION\u4f7f\u7528\u3057\u3066\u3044\u308bPHP\u30d0\u30fc\u30b8\u30e7\u30f3<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u6211\u5e76\u4e0d\u662f\u8981\u6c42\u4e00\u79cd\u7ffb\u8bd1\u65b9\u6848\uff0c\u800c\u662f\u8bf7\u4f60\u76f4\u63a5\u7528\u4e2d\u6587\u91cd\u65b0\u8868\u8fbe\u6240\u63d0\u4f9b\u7684\u53e5\u5b50\u3002 “\u5b9a\u6570” \u662f\u6307\u4e00\u4e2a […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30315","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\nPHP\u7684\u5e38\u91cf - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8ePHP\u7684\u5e38\u91cf\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/php\u7684\u5e38\u91cf\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP\u7684\u5e38\u91cf\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8ePHP\u7684\u5e38\u91cf\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/php\u7684\u5e38\u91cf\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-04-20T06:14:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T10:35:41+00:00\" \/>\n<meta name=\"author\" content=\"\u9038, \u79d1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u9038, \u79d1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/\",\"name\":\"PHP\u7684\u5e38\u91cf - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-04-20T06:14:23+00:00\",\"dateModified\":\"2025-08-12T10:35:41+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/85c1dae56e6ea1e695c73d33c684d487\"},\"description\":\"\u5173\u4e8ePHP\u7684\u5e38\u91cf\u7684\u6280\u672f\u6587\u7ae0\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PHP\u7684\u5e38\u91cf\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/85c1dae56e6ea1e695c73d33c684d487\",\"name\":\"\u9038, \u79d1\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/c94f6d9cbbfbca863fab309840bd690c153c95f8490c290ad2ed54dd693dad16?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/c94f6d9cbbfbca863fab309840bd690c153c95f8490c290ad2ed54dd693dad16?s=96&d=mm&r=g\",\"caption\":\"\u9038, \u79d1\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/keyi\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"PHP\u7684\u5e38\u91cf - Blog - Silicon Cloud","description":"\u5173\u4e8ePHP\u7684\u5e38\u91cf\u7684\u6280\u672f\u6587\u7ae0","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/php\u7684\u5e38\u91cf\/","og_locale":"zh_CN","og_type":"article","og_title":"PHP\u7684\u5e38\u91cf","og_description":"\u5173\u4e8ePHP\u7684\u5e38\u91cf\u7684\u6280\u672f\u6587\u7ae0","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/php\u7684\u5e38\u91cf\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-04-20T06:14:23+00:00","article_modified_time":"2025-08-12T10:35:41+00:00","author":"\u9038, \u79d1","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u9038, \u79d1","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"1 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/","name":"PHP\u7684\u5e38\u91cf - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-04-20T06:14:23+00:00","dateModified":"2025-08-12T10:35:41+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/85c1dae56e6ea1e695c73d33c684d487"},"description":"\u5173\u4e8ePHP\u7684\u5e38\u91cf\u7684\u6280\u672f\u6587\u7ae0","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/zh\/blog\/"},{"@type":"ListItem","position":2,"name":"PHP\u7684\u5e38\u91cf"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/85c1dae56e6ea1e695c73d33c684d487","name":"\u9038, \u79d1","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/c94f6d9cbbfbca863fab309840bd690c153c95f8490c290ad2ed54dd693dad16?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c94f6d9cbbfbca863fab309840bd690c153c95f8490c290ad2ed54dd693dad16?s=96&d=mm&r=g","caption":"\u9038, \u79d1"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/keyi\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/php%e7%9a%84%e5%b8%b8%e9%87%8f\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30315","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=30315"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30315\/revisions"}],"predecessor-version":[{"id":90092,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30315\/revisions\/90092"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=30315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=30315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=30315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}