{"id":30644,"date":"2022-11-14T19:36:43","date_gmt":"2023-09-11T06:57:01","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/"},"modified":"2025-08-12T20:09:41","modified_gmt":"2025-08-12T12:09:41","slug":"php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/","title":{"rendered":"PHP substr()\u51fd\u6570\u7684\u53c2\u6570"},"content":{"rendered":"

\u6709\u5173\u53c2\u6570\u7684\u7814\u7a76<\/h1>\n

\u622a\u53d6<\/p>\n

\u8bf7\u544a\u8bc9\u6211\u66f4\u591a\u5173\u4e8e\u5373\u5c06\u63a8\u51fa\u7684\u4ea7\u54c1\u3002
\n\u8bf7\u7ed9\u6211\u63d0\u4f9b\u66f4\u591a\u6709\u5173\u5373\u5c06\u53d1\u5e03\u7684\u4ea7\u54c1\u7684\u4fe1\u606f\u3002<\/p>\n

\r\nvar_dump<\/span>(<\/span>substr<\/span>(<\/span>'abcdef'<\/span>,<\/span> 0<\/span>,<\/span> 4<\/span>));<\/span> \/\/ \"abcd\"<\/span>\r\nvar_dump<\/span>(<\/span>substr<\/span>(<\/span>'abcdef'<\/span>,<\/span> -<\/span>3<\/span>,<\/span> 1<\/span>));<\/span> \/\/ \"d\"<\/span>\r\nvar_dump<\/span>(<\/span>substr<\/span>(<\/span>'abcdef'<\/span>,<\/span> -<\/span>3<\/span>,<\/span> -<\/span>1<\/span>));<\/span> \/\/ \"de\"<\/span>\r\nvar_dump<\/span>(<\/span>substr<\/span>(<\/span>'abcdef'<\/span>,<\/span> -<\/span>3<\/span>,<\/span> -<\/span>2<\/span>));<\/span> \/\/ \"d\"<\/span>\r\nvar_dump<\/span>(<\/span>substr<\/span>(<\/span>'abcdef'<\/span>,<\/span> -<\/span>3<\/span>,<\/span> -<\/span>3<\/span>));<\/span> \/\/ \"\"<\/span>\r\n<\/code><\/pre>\n
    \n
  • \n
      \u7b2c\u4e00\u5f15\u6570\uff1a\u5bfe\u8c61\u6587\u5b57\u5217<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u7b2c\u4e8c\u5f15\u6570\uff1a\u30dd\u30a4\u30f3\u30bf\u306e\u4f4d\u7f6e<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \u7b2c\u4e09\u5f15\u6570\uff1a\u30dd\u30a4\u30f3\u30bf\u304b\u3089\u6b63\u306e\u65b9\u5411\u306bn\u6587\u5b57 or \u6587\u672b\u304b\u3089\u8ca0\u306e\u65b9\u5411\u306b\u79fb\u52d5\u3057\u3001\u30aa\u30d5\u30bb\u30c3\u30c8\u304b\u3089\u8ca0\u306e\u65b9\u5411\u306b\u79fb\u52d5\u3057\u305f\u5206\u3092\u9664\u3044\u305f\u6587\u5b57\u3092\u8868\u793a<\/ul>\n
            \u7b2c\u4e09\u4e2a\u53c2\u6570\u7ed9\u4eba\u4e00\u79cd\u590d\u6742\u7684\u5370\u8c61\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u6709\u5173\u53c2\u6570\u7684\u7814\u7a76 \u622a\u53d6 \u8bf7\u544a\u8bc9\u6211\u66f4\u591a\u5173\u4e8e\u5373\u5c06\u63a8\u51fa\u7684\u4ea7\u54c1\u3002 \u8bf7\u7ed9\u6211\u63d0\u4f9b\u66f4\u591a\u6709\u5173\u5373\u5c06\u53d1\u5e03\u7684\u4ea7\u54c1\u7684\u4fe1\u606f\u3002 var_du […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30644","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\nPHP substr()\u51fd\u6570\u7684\u53c2\u6570 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8ePHP substr()\u51fd\u6570\u7684\u53c2\u6570\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-substr\u51fd\u6570\u7684\u53c2\u6570\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP substr()\u51fd\u6570\u7684\u53c2\u6570\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8ePHP substr()\u51fd\u6570\u7684\u53c2\u6570\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/php-substr\u51fd\u6570\u7684\u53c2\u6570\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-11T06:57:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T12:09:41+00:00\" \/>\n<meta name=\"author\" content=\"\u5b87, \u534e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u5b87, \u534e\" \/>\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-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/\",\"name\":\"PHP substr()\u51fd\u6570\u7684\u53c2\u6570 - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-09-11T06:57:01+00:00\",\"dateModified\":\"2025-08-12T12:09:41+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/513018e4e121d3add1b7c5de8be21458\"},\"description\":\"\u5173\u4e8ePHP substr()\u51fd\u6570\u7684\u53c2\u6570\u7684\u6280\u672f\u6587\u7ae0\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PHP substr()\u51fd\u6570\u7684\u53c2\u6570\"}]},{\"@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\/513018e4e121d3add1b7c5de8be21458\",\"name\":\"\u5b87, \u534e\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/63cd45cbc05a35fc4ff7637a163c83c4962ef58d27472726c3a3e0c9c5194f0f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/63cd45cbc05a35fc4ff7637a163c83c4962ef58d27472726c3a3e0c9c5194f0f?s=96&d=mm&r=g\",\"caption\":\"\u5b87, \u534e\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/yuhua\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"PHP substr()\u51fd\u6570\u7684\u53c2\u6570 - Blog - Silicon Cloud","description":"\u5173\u4e8ePHP substr()\u51fd\u6570\u7684\u53c2\u6570\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-substr\u51fd\u6570\u7684\u53c2\u6570\/","og_locale":"zh_CN","og_type":"article","og_title":"PHP substr()\u51fd\u6570\u7684\u53c2\u6570","og_description":"\u5173\u4e8ePHP substr()\u51fd\u6570\u7684\u53c2\u6570\u7684\u6280\u672f\u6587\u7ae0","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/php-substr\u51fd\u6570\u7684\u53c2\u6570\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-09-11T06:57:01+00:00","article_modified_time":"2025-08-12T12:09:41+00:00","author":"\u5b87, \u534e","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u5b87, \u534e","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"1 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/","name":"PHP substr()\u51fd\u6570\u7684\u53c2\u6570 - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-09-11T06:57:01+00:00","dateModified":"2025-08-12T12:09:41+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/513018e4e121d3add1b7c5de8be21458"},"description":"\u5173\u4e8ePHP substr()\u51fd\u6570\u7684\u53c2\u6570\u7684\u6280\u672f\u6587\u7ae0","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/zh\/blog\/"},{"@type":"ListItem","position":2,"name":"PHP substr()\u51fd\u6570\u7684\u53c2\u6570"}]},{"@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\/513018e4e121d3add1b7c5de8be21458","name":"\u5b87, \u534e","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/63cd45cbc05a35fc4ff7637a163c83c4962ef58d27472726c3a3e0c9c5194f0f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/63cd45cbc05a35fc4ff7637a163c83c4962ef58d27472726c3a3e0c9c5194f0f?s=96&d=mm&r=g","caption":"\u5b87, \u534e"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/yuhua\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/php-substr%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30644","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\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=30644"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30644\/revisions"}],"predecessor-version":[{"id":69014,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30644\/revisions\/69014"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=30644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=30644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=30644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}