{"id":75676,"date":"2024-10-16T00:17:18","date_gmt":"2024-10-15T16:17:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75676\/"},"modified":"2024-10-16T00:17:18","modified_gmt":"2024-10-15T16:17:18","slug":"mysql_assoc%e5%9c%a8%e6%93%8d%e4%bd%9c%e4%b8%ad%e6%9c%83%e5%87%ba%e7%8f%be%e5%93%aa%e4%ba%9b%e5%95%8f%e9%a1%8c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75676\/","title":{"rendered":"MySQL_ASSOC\u5728\u64cd\u4f5c\u4e2d\u6703\u51fa\u73fe\u54ea\u4e9b\u554f\u984c\uff1f"},"content":{"rendered":"<h1 id=\"mysql_assoc%e5%9c%a8%e6%93%8d%e4%bd%9c%e4%b8%ad%e6%9c%83%e5%87%ba%e7%8f%be%e5%93%aa%e4%ba%9b%e5%95%8f%e9%a1%8c%ef%bc%9f-QAwMINrtDk\">MySQL_ASSOC\u5728\u64cd\u4f5c\u4e2d\u6703\u51fa\u73fe\u54ea\u4e9b\u554f\u984c\uff1f<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c<code>MYSQL_ASSOC<\/code>\u662f\u4e00\u500b\u5e38\u7528\u7684\u9078\u9805\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528PHP\u9032\u884c\u6578\u64da\u67e5\u8a62\u6642\u3002\u9019\u500b\u9078\u9805\u5141\u8a31\u958b\u767c\u8005\u4ee5\u95dc\u806f\u6578\u7d44\u7684\u5f62\u5f0f\u7372\u53d6\u67e5\u8a62\u7d50\u679c\uff0c\u9019\u6a23\u53ef\u4ee5\u901a\u904e\u5217\u540d\u4f86\u8a2a\u554f\u6578\u64da\u3002\u7136\u800c\uff0c\u5728\u5be6\u969b\u64cd\u4f5c\u4e2d\uff0c\u4f7f\u7528<code>MYSQL_ASSOC<\/code>\u53ef\u80fd\u6703\u51fa\u73fe\u4e00\u4e9b\u554f\u984c\uff0c\u672c\u6587\u5c07\u63a2\u8a0e\u9019\u4e9b\u554f\u984c\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"1-%e6%95%88%e8%83%bd%e5%95%8f%e9%a1%8c-QAwMINrtDk\">1. \u6548\u80fd\u554f\u984c<\/h2>\n<p>\u4f7f\u7528<code>MYSQL_ASSOC<\/code>\u6642\uff0c\u6578\u64da\u5eab\u5728\u8fd4\u56de\u7d50\u679c\u6642\u9700\u8981\u5c07\u6bcf\u4e00\u884c\u7684\u6578\u64da\u8f49\u63db\u70ba\u95dc\u806f\u6578\u7d44\u3002\u9019\u500b\u904e\u7a0b\u53ef\u80fd\u6703\u5c0e\u81f4\u6548\u80fd\u4e0b\u964d\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u4f7f\u7528\u6578\u5b57\u7d22\u5f15\uff08\u5982<code>MYSQL_NUM<\/code>\uff09\u53ef\u4ee5\u6e1b\u5c11\u9019\u4e00\u8f49\u63db\u7684\u958b\u92b7\u3002<\/p>\n<h3 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-QAwMINrtDk\">\u89e3\u6c7a\u65b9\u6848<\/h3>\n<ul>\n<li>\u5728\u67e5\u8a62\u7d50\u679c\u8f03\u5c0f\u7684\u60c5\u6cc1\u4e0b\u4f7f\u7528<code>MYSQL_ASSOC<\/code>\uff0c\u4ee5\u4fbf\u65bc\u4ee3\u78bc\u7684\u53ef\u8b80\u6027\u3002<\/li>\n<li>\u5c0d\u65bc\u5927\u6578\u64da\u96c6\uff0c\u8003\u616e\u4f7f\u7528<code>MYSQL_NUM<\/code>\u6216<code>MYSQL_BOTH<\/code>\u4f86\u63d0\u9ad8\u6548\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e5%88%97%e5%90%8d%e8%a1%9d%e7%aa%81-QAwMINrtDk\">2. \u5217\u540d\u885d\u7a81<\/h2>\n<p>\u7576\u67e5\u8a62\u4e2d\u5305\u542b\u591a\u500b\u8868\u6642\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u5217\u540d\u885d\u7a81\u7684\u60c5\u6cc1\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5169\u500b\u8868\u4e2d\u90fd\u6709\u540d\u70ba<code>id<\/code>\u7684\u5217\uff0c\u4f7f\u7528<code>MYSQL_ASSOC<\/code>\u6642\u5c07\u7121\u6cd5\u78ba\u5b9a\u61c9\u8a72\u8fd4\u56de\u54ea\u4e00\u500b<code>id<\/code>\u3002<\/p>\n<h3 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-QAwMINrtDk\">\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u70ba\u4e86\u907f\u514d\u5217\u540d\u885d\u7a81\uff0c\u53ef\u4ee5\u5728SQL\u67e5\u8a62\u4e2d\u4f7f\u7528\u5225\u540d\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT a.id AS user_id, b.id AS order_id FROM users a JOIN orders b ON a.id = b.user_id;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4f7f\u7528<code>MYSQL_ASSOC<\/code>\u6642\uff0c\u80fd\u5920\u6e05\u695a\u5730\u8b58\u5225\u6bcf\u4e00\u5217\u7684\u4f86\u6e90\u3002<\/p>\n<h2 id=\"3-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e5%95%8f%e9%a1%8c-QAwMINrtDk\">3. \u6578\u64da\u985e\u578b\u554f\u984c<\/h2>\n<p>\u4f7f\u7528<code>MYSQL_ASSOC<\/code>\u6642\uff0c\u6578\u64da\u985e\u578b\u7684\u8f49\u63db\u53ef\u80fd\u6703\u5c0e\u81f4\u610f\u5916\u7684\u884c\u70ba\u3002\u4f8b\u5982\uff0c\u7576\u5f9e\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u5e03\u6797\u503c\u6642\uff0c\u53ef\u80fd\u6703\u8fd4\u56de\u6574\u6578\uff080\u62161\uff09\uff0c\u800c\u4e0d\u662f\u9810\u671f\u7684\u5e03\u6797\u503c\uff08true\u6216false\uff09\u3002\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u5f8c\u7e8c\u7684\u908f\u8f2f\u5224\u65b7\u3002<\/p>\n<h3 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-QAwMINrtDk\">\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u5728\u8655\u7406\u6578\u64da\u6642\uff0c\u958b\u767c\u8005\u61c9\u8a72\u660e\u78ba\u5730\u9032\u884c\u985e\u578b\u8f49\u63db\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>$is_active = (bool)$row['is_active'];<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4f7f\u7528\u6578\u64da\u6642\uff0c\u985e\u578b\u662f\u6b63\u78ba\u7684\u3002<\/p>\n<h2 id=\"4-%e9%8c%af%e8%aa%a4%e8%99%95%e7%90%86-QAwMINrtDk\">4. \u932f\u8aa4\u8655\u7406<\/h2>\n<p>\u5728\u4f7f\u7528<code>MYSQL_ASSOC<\/code>\u6642\uff0c\u82e5\u67e5\u8a62\u5931\u6557\uff0c\u958b\u767c\u8005\u9700\u8981\u78ba\u4fdd\u80fd\u5920\u6b63\u78ba\u6355\u7372\u932f\u8aa4\u3002\u82e5\u672a\u80fd\u59a5\u5584\u8655\u7406\u932f\u8aa4\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u5d29\u6f70\u6216\u8fd4\u56de\u4e0d\u6b63\u78ba\u7684\u6578\u64da\u3002<\/p>\n<h3 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-QAwMINrtDk\">\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u4f7f\u7528try-catch\u8a9e\u53e5\u4f86\u6355\u7372\u7570\u5e38\uff0c\u4e26\u5728\u51fa\u73fe\u932f\u8aa4\u6642\u63d0\u4f9b\u6709\u610f\u7fa9\u7684\u932f\u8aa4\u4fe1\u606f\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>try {\n    $result = mysqli_query($conn, $query);\n    if (!$result) {\n        throw new Exception('Query failed: ' . mysqli_error($conn));\n    }\n} catch (Exception $e) {\n    echo 'Error: ' . $e-&gt;getMessage();\n}<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-QAwMINrtDk\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u4f7f\u7528<code>MYSQL_ASSOC<\/code>\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610f\u6548\u80fd\u3001\u5217\u540d\u885d\u7a81\u3001\u6578\u64da\u985e\u578b\u53ca\u932f\u8aa4\u8655\u7406\u7b49\u554f\u984c\u3002\u901a\u904e\u9069\u7576\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u9019\u4e9b\u554f\u984c\u5c0d\u958b\u767c\u7684\u5f71\u97ff\u3002\u82e5\u60a8\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u652f\u6301\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u63d0\u5347\u60a8\u7684\u61c9\u7528\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u8a0eMySQL_ASSOC\u5728\u6578\u64da\u64cd\u4f5c\u4e2d\u53ef\u80fd\u51fa\u73fe\u7684\u554f\u984c\uff0c\u5305\u62ec\u6027\u80fd\u3001\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u53ca\u932f\u8aa4\u8655\u7406\u7b49\u6311\u6230\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-75676","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75676","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=75676"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75676\/revisions"}],"predecessor-version":[{"id":75677,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75676\/revisions\/75677"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75676"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75676"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}