{"id":180428,"date":"2024-11-09T10:11:19","date_gmt":"2024-11-09T02:11:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180428\/"},"modified":"2024-11-09T10:11:20","modified_gmt":"2024-11-09T02:11:20","slug":"%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90php-foreach%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8-php-foreach-%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180428\/","title":{"rendered":"\u6df1\u5ea6\u89e3\u6790php foreach\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528 (php foreach \u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90php-foreach%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8-tSKnOUfeTE\">\u6df1\u5ea6\u89e3\u6790PHP foreach\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u7db2\u9801\u958b\u767c\u4e2d\uff0cPHP\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u4f3a\u670d\u5668\u7aef\u8173\u672c\u8a9e\u8a00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u7279\u5225\u662f\u7576\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u591a\u689d\u8a18\u9304\u6642\uff0cPHP\u7684foreach\u5faa\u74b0\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u904d\u6b77\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0ePHP foreach\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\uff0c\u4e26\u63d0\u4f9b\u5be6\u969b\u7684\u4ee3\u78bc\u793a\u4f8b\u4ee5\u5e6b\u52a9\u7406\u89e3\u3002<\/p>\n<h2 id=\"php-foreach%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-tSKnOUfeTE\">PHP foreach\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>foreach\u662f\u4e00\u7a2e\u7528\u65bc\u904d\u6b77\u6578\u7d44\u6216\u5c0d\u8c61\u7684\u63a7\u5236\u7d50\u69cb\u3002\u5b83\u7684\u8a9e\u6cd5\u7c21\u55ae\uff0c\u80fd\u5920\u8b93\u958b\u767c\u8005\u8f15\u9b06\u5730\u8a2a\u554f\u6578\u7d44\u4e2d\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u3002\u4ee5\u4e0b\u662fforeach\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>\nforeach ($array as $value) {\n    \/\/ \u4ee3\u78bc\u908f\u8f2f\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c$array\u662f\u8981\u904d\u6b77\u7684\u6578\u7d44\uff0c\u800c$value\u5247\u662f\u7576\u524d\u904d\u6b77\u5230\u7684\u5143\u7d20\u3002\u9019\u7a2e\u7d50\u69cb\u7279\u5225\u9069\u5408\u7528\u65bc\u8655\u7406\u5f9e\u6578\u64da\u5eab\u67e5\u8a62\u8fd4\u56de\u7684\u7d50\u679c\u96c6\u3002<\/p>\n<h2 id=\"%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%8f%90%e5%8f%96%e6%95%b8%e6%93%9a-tSKnOUfeTE\">\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da<\/h2>\n<p>\u5728\u4f7f\u7528foreach\u4e4b\u524d\uff0c\u6211\u5011\u9996\u5148\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528PDO\uff08PHP Data Objects\uff09\u5f9eMySQL\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\ntry {\n    $pdo = new PDO('mysql:host=localhost;dbname=testdb', 'username', 'password');\n    $pdo-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);\n    \n    $stmt = $pdo-&gt;query('SELECT * FROM users');\n    $results = $stmt-&gt;fetchAll(PDO::FETCH_ASSOC);\n} catch (PDOException $e) {\n    echo 'Connection failed: ' . $e-&gt;getMessage();\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5efa\u7acb\u4e86\u4e00\u500bPDO\u9023\u63a5\uff0c\u7136\u5f8c\u57f7\u884c\u4e86\u4e00\u500b\u67e5\u8a62\u4ee5\u7372\u53d6users\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\u3002fetchAll\u65b9\u6cd5\u5c07\u7d50\u679c\u96c6\u4ee5\u95dc\u806f\u6578\u7d44\u7684\u5f62\u5f0f\u8fd4\u56de\uff0c\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u4f7f\u7528foreach\u4f86\u904d\u6b77\u9019\u4e9b\u6578\u64da\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8foreach%e9%81%8d%e6%ad%b7%e6%95%b8%e6%93%9a-tSKnOUfeTE\">\u4f7f\u7528foreach\u904d\u6b77\u6578\u64da<\/h2>\n<p>\u4e00\u65e6\u6211\u5011\u7372\u5f97\u4e86\u6578\u64da\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528foreach\u4f86\u904d\u6b77\u4e26\u986f\u793a\u6bcf\u4e00\u689d\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528foreach\u4f86\u8f38\u51fa\u7528\u6236\u4fe1\u606f\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nforeach ($results as $row) {\n    echo '\u7528\u6236ID: ' . $row['id'] . '<br>';\n    echo '\u7528\u6236\u540d: ' . $row['username'] . '<br>';\n    echo '\u96fb\u5b50\u90f5\u4ef6: ' . $row['email'] . '<br><br>';\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u904d\u6b77\u4e86$results\u6578\u7d44\uff0c\u4e26\u4f7f\u7528$row\u8b8a\u91cf\u4f86\u8a2a\u554f\u6bcf\u4e00\u689d\u8a18\u9304\u7684\u5177\u9ad4\u5b57\u6bb5\u3002\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u8f15\u9b06\u5730\u986f\u793a\u51fa\u7528\u6236\u7684ID\u3001\u7528\u6236\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n<h2 id=\"foreach%e7%9a%84%e5%84%aa%e5%8b%a2-tSKnOUfeTE\">foreach\u7684\u512a\u52e2<\/h2>\n<p>\u4f7f\u7528foreach\u904d\u6b77\u6578\u64da\u5eab\u67e5\u8a62\u7d50\u679c\u6709\u5e7e\u500b\u660e\u986f\u7684\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u7c21\u6f54\u6027\uff1a<\/strong>foreach\u8a9e\u6cd5\u7c21\u55ae\uff0c\u6613\u65bc\u7406\u89e3\uff0c\u80fd\u5920\u6e1b\u5c11\u4ee3\u78bc\u7684\u8907\u96dc\u6027\u3002<\/li>\n<li><strong>\u53ef\u8b80\u6027\uff1a<\/strong>\u4f7f\u7528foreach\u4f7f\u5f97\u4ee3\u78bc\u66f4\u5177\u53ef\u8b80\u6027\uff0c\u958b\u767c\u8005\u80fd\u5920\u5feb\u901f\u7406\u89e3\u6578\u64da\u7684\u8655\u7406\u908f\u8f2f\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>foreach\u53ef\u4ee5\u8f15\u9b06\u5730\u8207\u5176\u4ed6\u63a7\u5236\u7d50\u69cb\u7d50\u5408\u4f7f\u7528\uff0c\u5f9e\u800c\u5be6\u73fe\u66f4\u8907\u96dc\u7684\u908f\u8f2f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-tSKnOUfeTE\">\u7e3d\u7d50<\/h2>\n<p>PHP\u7684foreach\u5faa\u74b0\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u6548\u4e14\u6613\u65bc\u4f7f\u7528\u7684\u65b9\u5f0f\u4f86\u904d\u6b77\u67e5\u8a62\u7d50\u679c\u3002\u901a\u904e\u7c21\u55ae\u7684\u4ee3\u78bc\u793a\u4f8b\uff0c\u6211\u5011\u53ef\u4ee5\u770b\u5230\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u4e26\u4f7f\u7528foreach\u9032\u884c\u904d\u6b77\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u63d0\u9ad8\u4e86\u4ee3\u78bc\u7684\u53ef\u8b80\u6027\uff0c\u9084\u4f7f\u5f97\u6578\u64da\u8655\u7406\u8b8a\u5f97\u66f4\u52a0\u9748\u6d3b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684PHP\u61c9\u7528\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0ePHP foreach\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u7684\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u7c21\u5316\u4ee3\u78bc\u7d50\u69cb\uff0c\u52a9\u529b\u958b\u767c\u8005\u66f4\u9ad8\u6548\u7de8\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-180428","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180428","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=180428"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180428\/revisions"}],"predecessor-version":[{"id":180429,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180428\/revisions\/180429"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}