{"id":49072,"date":"2024-12-02T10:08:03","date_gmt":"2024-12-02T02:08:03","guid":{"rendered":"https:\/\/fwq.ai\/blog\/49072\/"},"modified":"2024-12-02T10:08:03","modified_gmt":"2024-12-02T02:08:03","slug":"%e5%a6%82%e4%bd%95%e5%b0%86mongodb-%e8%81%9a%e5%90%88%e6%9f%a5%e8%af%a2%e4%b8%ad%e7%9a%84-substr-%e6%93%8d%e4%bd%9c%e7%ac%a6%e8%bd%ac%e6%8d%a2%e4%b8%ba-php-%e4%bb%a3%e7%a0%81%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/49072\/","title":{"rendered":"\u5982\u4f55\u5c06MongoDB \u805a\u5408\u67e5\u8be2\u4e2d\u7684 $substr \u64cd\u4f5c\u7b26\u8f6c\u6362\u4e3a PHP \u4ee3\u7801\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u5c06MongoDB \u805a\u5408\u67e5\u8be2\u4e2d\u7684 $substr \u64cd\u4f5c\u7b26\u8f6c\u6362\u4e3a PHP \u4ee3\u7801\uff1f<\/h1>\n

\u5b66\u4e60\u6587\u7ae0<\/span>\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0\u300a\u5982\u4f55\u5c06MongoDB \u805a\u5408\u67e5\u8be2\u4e2d\u7684 $substr \u64cd\u4f5c\u7b26\u8f6c\u6362\u4e3a PHP \u4ee3\u7801\uff1f\u300b<\/span>\u5c06\u4f1a\u4ecb\u7ecd\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60\u6587\u7ae0<\/span>\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\"\u5982\u4f55\u5c06MongoDB<\/p>\n

mongo $substr\u8f6c\u6362\u4e3aphp<\/strong><\/p>\n

\u5728php\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528”$substr”\u7ba1\u9053\u64cd\u4f5c\u7b26\u6765\u4ece\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\u3002\u5176\u8bed\u6cd5\u4e3a\uff1a<\/p>\n

$substr: [\"<string>\", <start>, <length>]<\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • <string> \u662f\u8981\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\u7684\u5b57\u6bb5\u3002<\/li>\n
  • <start> \u662f\u5b50\u5b57\u7b26\u4e32\u5f00\u59cb\u4f4d\u7f6e\u7684\u7d22\u5f15\u3002<\/li>\n
  • <length> \u662f\u5b50\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n
    \u95ee\u9898\u4e2d\u805a\u5408\u67e5\u8be2\u7684php\u5b9e\u73b0<\/strong><\/p>\n
    \u8981\u5c06\u95ee\u9898\u4e2d\u63d0\u4f9b\u7684mongo\u805a\u5408\u67e5\u8be2\u8f6c\u6362\u4e3aphp\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
    $this->mongo_Collelection->aggregate(\n    \/\/ $where1\u7701\u7565\n    [\n        '$project' => [\n            'date' => ['$substr' => ['time_start', 0, 10]],\n            'income' => 1,\n        ],\n    ],\n    [\n        '$group' => [\n            '_id' => ['date' => '$date'],\n            'sumincome' => ['$sum' => '$income'],\n        ],\n    ],\n    \/\/ $where2\u7701\u7565\n);<\/pre>\n
    \u5728\u8fd9\u4e2a\u67e5\u8be2\u4e2d\uff1a<\/p>\n
      \n
    • $project\u7ba1\u9053\u64cd\u4f5c\u7b26\u4f7f\u7528$substr\u63d0\u53d6”time_start”\u5b57\u6bb5\u7684\u524d10\u4e2a\u5b57\u7b26\uff0c\u5e76\u5c06\u5176\u91cd\u547d\u540d\u4e3a”date”\u3002<\/li>\n
    • $group\u7ba1\u9053\u64cd\u4f5c\u7b26\u6839\u636e”date”\u5b57\u6bb5\u5bf9\u7ed3\u679c\u8fdb\u884c\u5206\u7ec4\uff0c\u5e76\u5c06”income”\u5b57\u6bb5\u7684\u548c\u5b58\u50a8\u5728”sumincome”\u4e2d\u3002<\/li>\n<\/ul>\n
      \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u5c06MongoDB \u805a\u5408\u67e5\u8be2\u4e2d\u7684 $substr \u64cd\u4f5c\u7b26\u8f6c\u6362\u4e3a PHP \u4ee3\u7801\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u5982\u4f55\u5c06MongoDB \u805a\u5408\u67e5\u8be2\u4e2d\u7684 $substr \u64cd\u4f5c\u7b26\u8f6c\u6362\u4e3a PHP \u4ee3\u7801\uff1f \u5b66\u4e60\u6587\u7ae0\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0\u300a\u5982\u4f55\u5c06MongoDB \u805a\u5408\u67e5\u8be2\u4e2d\u7684 $substr \u64cd\u4f5c\u7b26\u8f6c\u6362\u4e3a PHP \u4ee3\u7801\uff1f\u300b\u5c06\u4f1a\u4ecb\u7ecd\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60\u6587\u7ae0\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01 mongo $substr\u8f6c\u6362\u4e3aphp \u5728php\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528”$substr”\u7ba1\u9053\u64cd\u4f5c\u7b26\u6765\u4ece\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\u3002\u5176\u8bed\u6cd5\u4e3a\uff1a $substr: [“<string>”, <start>, <length>] \u5176\u4e2d\uff1a <string> \u662f\u8981\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\u7684\u5b57\u6bb5\u3002 <start> \u662f\u5b50\u5b57\u7b26\u4e32\u5f00\u59cb\u4f4d\u7f6e\u7684\u7d22\u5f15\u3002 <length> \u662f\u5b50\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u3002 \u95ee\u9898\u4e2d\u805a\u5408\u67e5\u8be2\u7684php\u5b9e\u73b0 \u8981\u5c06\u95ee\u9898\u4e2d\u63d0\u4f9b\u7684mongo\u805a\u5408\u67e5\u8be2\u8f6c\u6362\u4e3aphp\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a $this->mongo_Collelection->aggregate( \/\/ $where1\u7701\u7565 [ ‘$project’ => [ ‘date’ => [‘$substr’ => [‘time_start’, 0, 10]], ‘income’ => 1, ], ], [ ‘$group’ => [ ‘_id’ => [‘date’ => […]<\/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-49072","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/49072","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=49072"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/49072\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=49072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=49072"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=49072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}