{"id":23718,"date":"2024-11-21T09:45:55","date_gmt":"2024-11-21T01:45:55","guid":{"rendered":"https:\/\/fwq.ai\/blog\/23718\/"},"modified":"2024-11-21T09:45:55","modified_gmt":"2024-11-21T01:45:55","slug":"thinkphp5%e6%8e%a2%e8%ae%a8%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%admql%e5%af%b9%e8%b1%a1%e6%98%af%e5%90%a6%e4%b8%ba%e7%a9%ba-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/23718\/","title":{"rendered":"thinkphp5\u63a2\u8ba8\u5982\u4f55\u5224\u65adMQL\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a"},"content":{"rendered":"

\u5728\u4f7f\u7528thinkphp5\u4e2d\u7684mql\u5bf9\u8c61\u65f6\uff0c\u6211\u4eec\u6709\u65f6\u9700\u8981\u5224\u65ad\u8fd9\u4e2a\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u5982\u4f55\u5224\u65admql\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002<\/p>\n

    \n
  1. \u4ec0\u4e48\u662fMQL\u5bf9\u8c61
    MQL\uff08Model Query Language\uff09\u5bf9\u8c61\u662fThinkPHP5\u4e2d\u57fa\u7840\u6a21\u578b\u7c7bQuery\u7684\u5b9e\u4f8b\uff0c\u5b83\u7528\u4e8e\u6784\u5efa\u6570\u636e\u5e93\u7684\u67e5\u8be2\u6761\u4ef6\u548c\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n

    \u5728ThinkPHP5\u4e2d\u6bcf\u4e2a\u6a21\u578b\u90fd\u6709\u4e00\u4e2a\u9ed8\u8ba4\u7684MQL\u5bf9\u8c61\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6a21\u578b\u7684\u9759\u6001\u65b9\u6cd5\u83b7\u5f97\u8fd9\u4e2a\u5bf9\u8c61\uff0c\u5982\uff1a<\/p>\n

    $userModel = new ppusermodelUserModel;\n$userModel->where('username', 'like', '%admin%')->select();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u540c\u6837\u53ef\u4ee5\u5199\u6210\uff1a<\/p>\n
    $userModel = ppusermodelUserModel::where('username', 'like', '%admin%')->select();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \n
    1. \u5224\u65adMQL\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a
      \u5728\u64cd\u4f5c\u6570\u636e\u5e93\u65f6\uff0c\u6211\u4eec\u6709\u65f6\u4f1a\u9047\u5230\u67e5\u8be2\u7ed3\u679c\u4e3a\u7a7a\u7684\u60c5\u51b5\uff0c\u8fd9\u65f6\u6211\u4eec\u9700\u8981\u5224\u65adMQL\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002\u5224\u65ad\u65b9\u6cd5\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/li>\n<\/ol>\n
        \n
      • \u901a\u8fc7count()\u65b9\u6cd5\u5224\u65ad<\/li>\n<\/ul>\n
        MQL\u5bf9\u8c61\u63d0\u4f9b\u4e86count()\u65b9\u6cd5\uff0c\u7528\u4e8e\u67e5\u8be2\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u6570\u91cf\u3002\u5982\u679c\u8fd4\u56de\u7684\u8bb0\u5f55\u6570\u91cf\u4e3a0\uff0c\u5219\u8bf4\u660eMQL\u5bf9\u8c61\u4e3a\u7a7a\u3002<\/p>\n
        $userModel = ppusermodelUserModel::where('username', 'like', '%notexist%');\nif($userModel->count() == 0){\n    echo 'MQL\u5bf9\u8c61\u4e3a\u7a7a';\n}<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
          \n
        • \u901a\u8fc7find()\u65b9\u6cd5\u5224\u65ad<\/li>\n<\/ul>\n
          MQL\u5bf9\u8c61\u63d0\u4f9b\u4e86find()\u65b9\u6cd5\uff0c\u7528\u4e8e\u67e5\u8be2\u7b26\u5408\u6761\u4ef6\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55\u3002\u5982\u679c\u8fd4\u56de\u7684\u7ed3\u679c\u4e3anull\uff0c\u5219\u8bf4\u660eMQL\u5bf9\u8c61\u4e3a\u7a7a\u3002<\/p>\n
          \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
          $userModel = ppusermodelUserModel::where('username', 'like', '%notexist%')->find();\nif(is_null($userModel)){\n    echo 'MQL\u5bf9\u8c61\u4e3a\u7a7a';\n}<\/pre>\n
           \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
            \n
          • \u901a\u8fc7select()\u65b9\u6cd5\u5224\u65ad<\/li>\n<\/ul>\n
            MQL\u5bf9\u8c61\u63d0\u4f9b\u4e86select()\u65b9\u6cd5\uff0c\u7528\u4e8e\u67e5\u8be2\u7b26\u5408\u6761\u4ef6\u7684\u6240\u6709\u8bb0\u5f55\u3002\u5982\u679c\u8fd4\u56de\u7684\u7ed3\u679c\u4e3a\u7a7a\u6570\u7ec4\uff0c\u5219\u8bf4\u660eMQL\u5bf9\u8c61\u4e3a\u7a7a\u3002<\/p>\n
            $userModel = ppusermodelUserModel::where('username', 'like', '%notexist%')->select();\nif(empty($userModel)){\n    echo 'MQL\u5bf9\u8c61\u4e3a\u7a7a';\n}<\/pre>\n
             \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
              \n
            • \u901a\u8fc7isEmpty()\u65b9\u6cd5\u5224\u65ad<\/li>\n<\/ul>\n
              MQL\u5bf9\u8c61\u63d0\u4f9b\u4e86isEmpty()\u65b9\u6cd5\uff0c\u7528\u4e8e\u5224\u65adMQL\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002\u5982\u679c\u8fd4\u56de\u7ed3\u679c\u4e3atrue\uff0c\u5219\u8bf4\u660eMQL\u5bf9\u8c61\u4e3a\u7a7a\u3002<\/p>\n
              $userModel = ppusermodelUserModel::where('username', 'like', '%notexist%');\nif($userModel->isEmpty()){\n    echo 'MQL\u5bf9\u8c61\u4e3a\u7a7a';\n}<\/pre>\n
               \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                \n
              1. \u603b\u7ed3
                \u5728\u4f7f\u7528ThinkPHP5\u7684MQL\u5bf9\u8c61\u65f6\uff0c\u6211\u4eec\u9700\u8981\u7ecf\u5e38\u5224\u65adMQL\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002\u672c\u6587\u4ecb\u7ecd\u4e86\u56db\u79cd\u5224\u65ad\u65b9\u6cd5\uff0c\u5206\u522b\u662f\u901a\u8fc7count()\u3001find()\u3001select()\u548cisEmpty()\u65b9\u6cd5\u6765\u8fdb\u884c\u5224\u65ad\u3002\u9009\u62e9\u9002\u5f53\u7684\u5224\u65ad\u65b9\u6cd5\u80fd\u591f\u4f7f\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u4f18\u96c5\uff0c\u540c\u65f6\u4e5f\u80fd\u591f\u63d0\u9ad8\u4ee3\u7801\u7684\u8fd0\u884c\u6548\u7387\u3002<\/li>\n<\/ol>\n
                \u4ee5\u4e0a\u5c31\u662fthinkphp5\u63a2\u8ba8\u5982\u4f55\u5224\u65adMQL\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
                \u5728\u4f7f\u7528thinkphp5\u4e2d\u7684mql\u5bf9\u8c61\u65f6\uff0c\u6211\u4eec\u6709\u65f6\u9700\u8981\u5224\u65ad\u8fd9\u4e2a\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u5982\u4f55\u5224\u65admql\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002 \u4ec0\u4e48\u662fMQL\u5bf9\u8c61MQL\uff08Model Query Language\uff09\u5bf9\u8c61\u662fThinkPHP5\u4e2d\u57fa\u7840\u6a21\u578b\u7c7bQuery\u7684\u5b9e\u4f8b\uff0c\u5b83\u7528\u4e8e\u6784\u5efa\u6570\u636e\u5e93\u7684\u67e5\u8be2\u6761\u4ef6\u548c\u64cd\u4f5c\u3002 \u5728ThinkPHP5\u4e2d\u6bcf\u4e2a\u6a21\u578b\u90fd\u6709\u4e00\u4e2a\u9ed8\u8ba4\u7684MQL\u5bf9\u8c61\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6a21\u578b\u7684\u9759\u6001\u65b9\u6cd5\u83b7\u5f97\u8fd9\u4e2a\u5bf9\u8c61\uff0c\u5982\uff1a $userModel = new ppusermodelUserModel; $userModel->where(‘username’, ‘like’, ‘%admin%’)->select(); \u767b\u5f55\u540e\u590d\u5236 \u540c\u6837\u53ef\u4ee5\u5199\u6210\uff1a $userModel = ppusermodelUserModel::where(‘username’, ‘like’, ‘%admin%’)->select(); \u767b\u5f55\u540e\u590d\u5236 \u5224\u65adMQL\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u5728\u64cd\u4f5c\u6570\u636e\u5e93\u65f6\uff0c\u6211\u4eec\u6709\u65f6\u4f1a\u9047\u5230\u67e5\u8be2\u7ed3\u679c\u4e3a\u7a7a\u7684\u60c5\u51b5\uff0c\u8fd9\u65f6\u6211\u4eec\u9700\u8981\u5224\u65adMQL\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002\u5224\u65ad\u65b9\u6cd5\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a \u901a\u8fc7count()\u65b9\u6cd5\u5224\u65ad MQL\u5bf9\u8c61\u63d0\u4f9b\u4e86count()\u65b9\u6cd5\uff0c\u7528\u4e8e\u67e5\u8be2\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u6570\u91cf\u3002\u5982\u679c\u8fd4\u56de\u7684\u8bb0\u5f55\u6570\u91cf\u4e3a0\uff0c\u5219\u8bf4\u660eMQL\u5bf9\u8c61\u4e3a\u7a7a\u3002 $userModel = ppusermodelUserModel::where(‘username’, ‘like’, ‘%notexist%’); if($userModel->count() == 0){ echo ‘MQL\u5bf9\u8c61\u4e3a\u7a7a’; } \u767b\u5f55\u540e\u590d\u5236 \u901a\u8fc7find()\u65b9\u6cd5\u5224\u65ad MQL\u5bf9\u8c61\u63d0\u4f9b\u4e86find()\u65b9\u6cd5\uff0c\u7528\u4e8e\u67e5\u8be2\u7b26\u5408\u6761\u4ef6\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55\u3002\u5982\u679c\u8fd4\u56de\u7684\u7ed3\u679c\u4e3anull\uff0c\u5219\u8bf4\u660eMQL\u5bf9\u8c61\u4e3a\u7a7a\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b $userModel = ppusermodelUserModel::where(‘username’, ‘like’, ‘%notexist%’)->find(); if(is_null($userModel)){ echo ‘MQL\u5bf9\u8c61\u4e3a\u7a7a’; } \u767b\u5f55\u540e\u590d\u5236 \u901a\u8fc7select()\u65b9\u6cd5\u5224\u65ad MQL\u5bf9\u8c61\u63d0\u4f9b\u4e86select()\u65b9\u6cd5\uff0c\u7528\u4e8e\u67e5\u8be2\u7b26\u5408\u6761\u4ef6\u7684\u6240\u6709\u8bb0\u5f55\u3002\u5982\u679c\u8fd4\u56de\u7684\u7ed3\u679c\u4e3a\u7a7a\u6570\u7ec4\uff0c\u5219\u8bf4\u660eMQL\u5bf9\u8c61\u4e3a\u7a7a\u3002 $userModel = ppusermodelUserModel::where(‘username’, ‘like’, ‘%notexist%’)->select(); […]<\/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-23718","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23718","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=23718"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23718\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=23718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=23718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=23718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}