{"id":47884,"date":"2024-12-02T17:45:07","date_gmt":"2024-12-02T09:45:07","guid":{"rendered":"https:\/\/fwq.ai\/blog\/47884\/"},"modified":"2024-12-02T17:45:07","modified_gmt":"2024-12-02T09:45:07","slug":"php-%e5%87%bd%e6%95%b0%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e9%80%92%e5%bd%92%e5%ae%9e%e7%8e%b0%e5%b9%bf%e5%ba%a6%e4%bc%98%e5%85%88%e6%90%9c%e7%b4%a2%e7%ae%97%e6%b3%95%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/47884\/","title":{"rendered":"PHP \u51fd\u6570\u4e2d\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u7b97\u6cd5\uff1f"},"content":{"rendered":"

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

PHP \u51fd\u6570\u4e2d\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u7b97\u6cd5\uff1f<\/h1>\n

\u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300aPHP \u51fd\u6570\u4e2d\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u7b97\u6cd5\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>\n

PHP\u4e2d\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0BFS\u7b97\u6cd5\uff1a\u6807\u8bb0\u8d77\u59cb\u8282\u70b9\u4e3a\u5df2\u8bbf\u95ee\u3002\u5165\u961f\u8be5\u8282\u70b9\u7684\u6240\u6709\u76f8\u90bb\u8282\u70b9\u3002\u4ece\u961f\u5217\u4e2d\u53d6\u51fa\u4e0b\u4e00\u4e2a\u8282\u70b9\u3002\u9012\u5f52\u8c03\u7528BFS\uff0c\u76f4\u5230\u961f\u5217\u4e3a\u7a7a\u3002<\/p>\n

\"PHP<\/p>\n

\u5728 PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u7b97\u6cd5<\/strong><\/p>\n

\u7b80\u4ecb\uff1a<\/strong>
\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22 (BFS) \u662f\u4e00\u79cd\u56fe\u8bba\u7b97\u6cd5\uff0c\u7528\u4e8e\u4ece\u6e90\u70b9\u51fa\u53d1\u904d\u5386\u6240\u6709\u53ef\u8fbe\u70b9\u3002PHP \u51fd\u6570\u53ef\u4ee5\u4f7f\u7528\u9012\u5f52\u6765\u5b9e\u73b0 BFS\u3002<\/p>\n

\u5b9e\u73b0\uff1a<\/strong><\/p>\n

function bfs($node, $visited, &$queue)\n{\n    \/\/ \u6807\u8bb0\u8282\u70b9\u4e3a\u5df2\u8bbf\u95ee\n    $visited[$node] = true;\n    \n    \/\/ \u5165\u961f\u76f8\u90bb\u8282\u70b9\n    foreach ($node->neighbors as $neighbor) {\n        if (!$visited[$neighbor]) {\n            $queue[] = $neighbor;\n        }\n    }\n    \n    \/\/ \u4ece\u961f\u5217\u4e2d\u53d6\u51fa\u4e0b\u4e00\u4e2a\u8282\u70b9\n    if (count($queue) > 0) {\n        $next_node = array_shift($queue);\n        bfs($next_node, $visited, $queue);\n    }\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n
\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u56fe\uff0c\u5176\u8282\u70b9\u7531Node<\/code>\u7c7b\u8868\u793a\uff0c\u90bb\u5c45\u5b58\u50a8\u5728neighbors<\/code>\u5c5e\u6027\u4e2d\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528 BFS \u4ece\u6e90\u70b9 1 \u904d\u5386\u56fe\uff1a<\/p>\n
\/\/ \u521b\u5efa\u56fe\n$n1 = new Node(1);\n$n2 = new Node(2);\n$n3 = new Node(3);\n$n4 = new Node(4);\n$n5 = new Node(5);\n\n$n1->neighbors = [$n2, $n3];\n$n2->neighbors = [$n4, $n5];\n$n3->neighbors = [$n5];\n$n4->neighbors = [];\n$n5->neighbors = [];\n\n\/\/ \u521d\u59cb\u5316\u8bbf\u95ee\u6807\u8bb0\u548c\u961f\u5217\n$visited = [];\n$queue = [$n1];\n\n\/\/ \u6267\u884c BFS\nbfs($n1, $visited, $queue);\n\n\/\/ \u8f93\u51fa\u904d\u5386\u987a\u5e8f\nforeach ($visited as $node => $visited) {\n    echo \"{$node} \";\n}<\/pre>\n
\u8f93\u51fa\uff1a<\/strong>
1 2 3 4 5<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u7c73\u4e91\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
PHP \u51fd\u6570\u4e2d\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u7b97\u6cd5\uff1f \u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300aPHP \u51fd\u6570\u4e2d\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u7b97\u6cd5\uff1f\u300b\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01 PHP\u4e2d\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0BFS\u7b97\u6cd5\uff1a\u6807\u8bb0\u8d77\u59cb\u8282\u70b9\u4e3a\u5df2\u8bbf\u95ee\u3002\u5165\u961f\u8be5\u8282\u70b9\u7684\u6240\u6709\u76f8\u90bb\u8282\u70b9\u3002\u4ece\u961f\u5217\u4e2d\u53d6\u51fa\u4e0b\u4e00\u4e2a\u8282\u70b9\u3002\u9012\u5f52\u8c03\u7528BFS\uff0c\u76f4\u5230\u961f\u5217\u4e3a\u7a7a\u3002 \u5728 PHP \u51fd\u6570\u4e2d\u4f7f\u7528\u9012\u5f52\u5b9e\u73b0\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u7b97\u6cd5 \u7b80\u4ecb\uff1a\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22 (BFS) \u662f\u4e00\u79cd\u56fe\u8bba\u7b97\u6cd5\uff0c\u7528\u4e8e\u4ece\u6e90\u70b9\u51fa\u53d1\u904d\u5386\u6240\u6709\u53ef\u8fbe\u70b9\u3002PHP \u51fd\u6570\u53ef\u4ee5\u4f7f\u7528\u9012\u5f52\u6765\u5b9e\u73b0 BFS\u3002 \u5b9e\u73b0\uff1a function bfs($node, $visited, &$queue) { \/\/ \u6807\u8bb0\u8282\u70b9\u4e3a\u5df2\u8bbf\u95ee $visited[$node] = true; \/\/ \u5165\u961f\u76f8\u90bb\u8282\u70b9 foreach ($node->neighbors as $neighbor) { if (!$visited[$neighbor]) { $queue[] = $neighbor; } } \/\/ \u4ece\u961f\u5217\u4e2d\u53d6\u51fa\u4e0b\u4e00\u4e2a\u8282\u70b9 if (count($queue) > 0) { $next_node = array_shift($queue); bfs($next_node, $visited, $queue); } } \u5b9e\u6218\u6848\u4f8b\uff1a […]<\/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-47884","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/47884","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=47884"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/47884\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=47884"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=47884"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=47884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}