{"id":189318,"date":"2024-11-12T06:38:21","date_gmt":"2024-11-11T22:38:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/189318\/"},"modified":"2024-11-12T06:38:22","modified_gmt":"2024-11-11T22:38:22","slug":"%e9%80%9a%e9%81%8e%e6%95%b8%e6%93%9a%e5%ba%abusername%e6%9f%a5%e8%a9%a2%ef%bc%8c%e8%bc%95%e9%ac%86%e7%8d%b2%e5%be%97id%e4%bf%a1%e6%81%af-%e6%95%b8%e6%93%9a%e5%ba%abusername%e7%8d%b2%e5%be%97id","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/189318\/","title":{"rendered":"\u901a\u904e\u6578\u64da\u5eabusername\u67e5\u8a62\uff0c\u8f15\u9b06\u7372\u5f97id\u4fe1\u606f (\u6578\u64da\u5eabusername\u7372\u5f97id)"},"content":{"rendered":"<h1 id=\"%e9%80%9a%e9%81%8e%e6%95%b8%e6%93%9a%e5%ba%abusername%e6%9f%a5%e8%a9%a2%ef%bc%8c%e8%bc%95%e9%ac%86%e7%8d%b2%e5%be%97id%e4%bf%a1%e6%81%af-%e6%95%b8%e6%93%9a%e5%ba%abusername%e7%8d%b2%e5%be%97id-dduBMpzwiw\">\u901a\u904e\u6578\u64da\u5eabusername\u67e5\u8a62\uff0c\u8f15\u9b06\u7372\u5f97id\u4fe1\u606f (\u6578\u64da\u5eabusername\u7372\u5f97id)<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7121\u8ad6\u662f\u4f01\u696d\u9084\u662f\u500b\u4eba\u9805\u76ee\uff0c\u6578\u64da\u5eab\u90fd\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u901a\u904e\u6578\u64da\u5eab\u4e2d\u7684username\u67e5\u8a62\u4f86\u7372\u5f97\u76f8\u61c9\u7684id\u4fe1\u606f\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-dduBMpzwiw\">\u6578\u64da\u5eab\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u662f\u4e00\u7a2e\u6709\u7d44\u7e54\u7684\u6578\u64da\u96c6\u5408\uff0c\u901a\u5e38\u7528\u65bc\u5b58\u5132\u548c\u7ba1\u7406\u4fe1\u606f\u3002\u6700\u5e38\u898b\u7684\u6578\u64da\u5eab\u985e\u578b\u5305\u62ec\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MySQL\u3001PostgreSQL\uff09\u548c\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MongoDB\uff09\u3002\u5728\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u4e2d\uff0c\u6578\u64da\u4ee5\u8868\u683c\u7684\u5f62\u5f0f\u5b58\u5132\uff0c\u6bcf\u500b\u8868\u683c\u7531\u884c\u548c\u5217\u7d44\u6210\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e9%80%9a%e9%81%8eusername%e6%9f%a5%e8%a9%a2id-dduBMpzwiw\">\u70ba\u4ec0\u9ebc\u9700\u8981\u901a\u904eusername\u67e5\u8a62id<\/h2>\n<p>\u5728\u8a31\u591a\u61c9\u7528\u4e2d\uff0cusername\u662f\u7528\u6236\u7684\u552f\u4e00\u6a19\u8b58\u7b26\uff0c\u800cid\u5247\u662f\u6578\u64da\u5eab\u4e2d\u7528\u6236\u7684\u4e3b\u9375\u3002\u901a\u904eusername\u67e5\u8a62id\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5feb\u901f\u7372\u53d6\u7528\u6236\u7684\u552f\u4e00\u6a19\u8b58\uff0c\u9032\u800c\u9032\u884c\u5f8c\u7e8c\u7684\u6578\u64da\u64cd\u4f5c\uff0c\u4f8b\u5982\u66f4\u65b0\u7528\u6236\u4fe1\u606f\u6216\u9032\u884c\u6b0a\u9650\u7ba1\u7406\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-dduBMpzwiw\">\u67e5\u8a62\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528MySQL\u7684\u67e5\u8a62\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u901a\u904eusername\u7372\u53d6id\u4fe1\u606f\uff1a<\/p>\n<pre><code>SELECT id FROM users WHERE username = 'exampleUser';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u5f9e\u540d\u70ba\u201cusers\u201d\u7684\u8868\u4e2d\u9078\u64c7id\uff0c\u689d\u4ef6\u662fusername\u7b49\u65bc\u201cexampleUser\u201d\u3002\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u8a72\u7528\u6236\u7684id\uff0c\u5982\u679c\u7528\u6236\u4e0d\u5b58\u5728\uff0c\u5247\u8fd4\u56de\u7a7a\u7d50\u679c\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8php%e9%80%b2%e8%a1%8c%e6%9f%a5%e8%a9%a2-dduBMpzwiw\">\u4f7f\u7528PHP\u9032\u884c\u67e5\u8a62<\/h2>\n<p>\u5982\u679c\u4f60\u6b63\u5728\u4f7f\u7528PHP\u4f86\u8207\u6578\u64da\u5eab\u4ea4\u4e92\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u4f86\u5be6\u73fe\u901a\u904eusername\u67e5\u8a62id\u7684\u529f\u80fd\uff1a<\/p>\n<pre><code>&lt;?php\n\/\/ \u9023\u63a5\u5230\u6578\u64da\u5eab\n$servername = \"localhost\";\n$username = \"username\";\n$password = \"password\";\n$dbname = \"database_name\";\n\n$conn = new mysqli($servername, $username, $password, $dbname);\n\n\/\/ \u6aa2\u67e5\u9023\u63a5\nif ($conn-&gt;connect_error) {\n    die(\"Connection failed: \" . $conn-&gt;connect_error);\n}\n\n\/\/ \u6e96\u5099\u67e5\u8a62\n$user = 'exampleUser';\n$sql = \"SELECT id FROM users WHERE username = ?\";\n$stmt = $conn-&gt;prepare($sql);\n$stmt-&gt;bind_param(\"s\", $user);\n$stmt-&gt;execute();\n$stmt-&gt;bind_result($id);\n$stmt-&gt;fetch();\n\nif ($id) {\n    echo \"User ID: \" . $id;\n} else {\n    echo \"User not found.\";\n}\n\n$stmt-&gt;close();\n$conn-&gt;close();\n?&gt;<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\uff0c\u7136\u5f8c\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u4f86\u67e5\u8a62\u7528\u6236\u7684id\u3002\u9019\u6a23\u4e0d\u50c5\u63d0\u9ad8\u4e86\u67e5\u8a62\u7684\u5b89\u5168\u6027\uff0c\u9084\u80fd\u9632\u6b62SQL\u6ce8\u5165\u653b\u64ca\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-dduBMpzwiw\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u78ba\u4fddusername\u7684\u552f\u4e00\u6027\uff0c\u4ee5\u907f\u514d\u67e5\u8a62\u7d50\u679c\u4e0d\u6e96\u78ba\u3002<\/li>\n<li>\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u4f86\u589e\u5f37\u5b89\u5168\u6027\uff0c\u9632\u6b62SQL\u6ce8\u5165\u3002<\/li>\n<li>\u5728\u67e5\u8a62\u4e4b\u524d\uff0c\u6aa2\u67e5\u6578\u64da\u5eab\u9023\u63a5\u662f\u5426\u6210\u529f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dduBMpzwiw\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u6578\u64da\u5eabusername\u67e5\u8a62id\u4fe1\u606f\u662f\u4e00\u500b\u5e38\u898b\u4e14\u5be6\u7528\u7684\u64cd\u4f5c\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u9ad8\u6548\u5730\u7ba1\u7406\u7528\u6236\u6578\u64da\u3002\u7121\u8ad6\u662f\u4f7f\u7528SQL\u67e5\u8a62\u9084\u662f\u901a\u904e\u7de8\u7a0b\u8a9e\u8a00\u9032\u884c\u64cd\u4f5c\uff0c\u638c\u63e1\u9019\u4e00\u6280\u80fd\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u4f60\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u7a69\u5b9a\u548c\u5b89\u5168\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u901a\u904e\u6578\u64da\u5eabusername\u67e5\u8a62\uff0c\u8f15\u9b06\u7372\u5f97\u5c0d\u61c9\u7684id\u4fe1\u606f\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u6548\u7387\uff0c\u7c21\u5316\u4fe1\u606f\u7ba1\u7406\u6d41\u7a0b\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-189318","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189318","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=189318"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189318\/revisions"}],"predecessor-version":[{"id":189319,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189318\/revisions\/189319"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=189318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=189318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=189318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}