{"id":202405,"date":"2025-05-13T08:17:09","date_gmt":"2025-05-13T00:17:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202405\/"},"modified":"2025-05-13T08:17:09","modified_gmt":"2025-05-13T00:17:09","slug":"php-%e5%87%bd%e6%95%b0%e7%bc%93%e5%ad%98%e6%8a%80%e6%9c%af%e8%af%a6%e8%a7%a3%ef%bc%9a%e5%a6%82%e4%bd%95%e8%a7%a3%e5%86%b3%e5%87%bd%e6%95%b0%e7%bc%93%e5%ad%98%e6%8a%80%e6%9c%af%e4%b8%ad%e7%9a%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202405\/","title":{"rendered":"php \u51fd\u6570\u7f13\u5b58\u6280\u672f\u8be6\u89e3\uff1a\u5982\u4f55\u89e3\u51b3\u51fd\u6570\u7f13\u5b58\u6280\u672f\u4e2d\u7684\u5e76\u53d1\u95ee\u9898\uff1f"},"content":{"rendered":"

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

php \u51fd\u6570\u7f13\u5b58\u6280\u672f\u8be6\u89e3\uff1a\u5982\u4f55\u89e3\u51b3\u51fd\u6570\u7f13\u5b58\u6280\u672f\u4e2d\u7684\u5e76\u53d1\u95ee\u9898\uff1f<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u300aphp \u51fd\u6570\u7f13\u5b58\u6280\u672f\u8be6\u89e3\uff1a\u5982\u4f55\u89e3\u51b3\u51fd\u6570\u7f13\u5b58\u6280\u672f\u4e2d\u7684\u5e76\u53d1\u95ee\u9898\uff1f\u300b\uff0c\u8986\u76d6\u4e86\u6587\u7ae0\u7684\u5e38\u89c1\u57fa\u7840\u77e5\u8bc6\uff0c\u5176\u5b9e\u4e00\u4e2a\u8bed\u8a00\u7684\u5168\u90e8\u77e5\u8bc6\u70b9\u4e00\u7bc7\u6587\u7ae0\u662f\u4e0d\u53ef\u80fd\u8bf4\u5b8c\u7684\uff0c\u4f46\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e9b\u95ee\u9898\uff0c\u8ba9\u8bfb\u8005\u5bf9\u81ea\u5df1\u7684\u638c\u63e1\u7a0b\u5ea6\u6709\u4e00\u5b9a\u7684\u8ba4\u8bc6(B \u6570)\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u66f4\u597d\u7684\u638c\u63e1\u5b83\u3002<\/p>\n

PHP \u51fd\u6570\u7f13\u5b58\u53ef\u89e3\u51b3\u5e76\u53d1\u95ee\u9898\uff0c\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u786e\u4fdd\u7f13\u5b58\u7ed3\u679c\u4e00\u81f4\u6027\uff1a1. \u4e92\u65a5\u9501\uff1a\u4ec5\u5141\u8bb8\u4e00\u4e2a\u8bf7\u6c42\u8bbf\u95ee\u7f13\u5b58\u30022. \u53cc\u91cd\u68c0\u67e5\u9501\uff1a\u5229\u7528 lazy loading \u4f18\u5316\u4e92\u65a5\u9501\u5b9e\u73b0\u30023. \u961f\u5217\uff1a\u4f9d\u6b21\u5904\u7406\u5f85\u5904\u7406\u51fd\u6570\u8c03\u7528\u3002<\/p>\n

<\/p>\n

PHP \u51fd\u6570\u7f13\u5b58\u6280\u672f\u8be6\u89e3\uff1a\u89e3\u51b3\u5e76\u53d1\u95ee\u9898<\/h2>\n

PHP \u51fd\u6570\u7f13\u5b58\u6280\u672f\u53ef\u901a\u8fc7\u5c06\u6602\u8d35\u7684\u51fd\u6570\u8c03\u7528\u7ed3\u679c\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\u6765\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u3002\u4f46\u662f\uff0c\u5f53\u540c\u65f6\u8bf7\u6c42\u76f8\u540c\u7684\u51fd\u6570\u8c03\u7528\u65f6\uff0c\u5e76\u53d1\u95ee\u9898\u53ef\u80fd\u4f1a\u4ea7\u751f\u3002<\/p>\n

\u5e76\u53d1\u95ee\u9898<\/h3>\n

\u5728\u5e76\u53d1\u73af\u5883\u4e2d\uff0c\u591a\u4e2a\u8bf7\u6c42\u53ef\u4ee5\u540c\u65f6\u5230\u8fbe\u5e76\u53d1\u51fd\u6570\u3002\u5982\u679c\u6ca1\u6709\u9002\u5f53\u7684\u5904\u7406\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u4ee5\u4e0b\u95ee\u9898\uff1a<\/p>\n

    \n
  • \u6570\u636e\u4e0d\u4e00\u81f4\u6027\uff1a<\/strong>\u4e0d\u540c\u7684\u8bf7\u6c42\u53ef\u80fd\u4f1a\u6536\u5230\u4e0d\u4e00\u81f4\u7684\u7ed3\u679c\uff0c\u56e0\u4e3a\u7f13\u5b58\u5c1a\u672a\u66f4\u65b0\u5305\u542b\u6700\u65b0\u7684\u51fd\u6570\u8c03\u7528\u7684\u7ed3\u679c\u3002<\/li>\n
  • \u6027\u80fd\u4e0b\u964d\uff1a<\/strong>\u672a\u7f13\u5b58\u7684\u51fd\u6570\u8c03\u7528\u4f1a\u8fc7\u5ea6\u52a0\u8f7d\u670d\u52a1\u5668\uff0c\u4ece\u800c\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<\/ul>\n

    \u89e3\u51b3\u65b9\u6848<\/h3>\n

    \u89e3\u51b3\u5e76\u53d1\u95ee\u9898\u9700\u8981\u4e00\u79cd\u673a\u5236\u6765\u786e\u4fdd\u7f13\u5b58\u4e2d\u7684\u51fd\u6570\u8c03\u7528\u7ed3\u679c\u662f\u6700\u65b0\u7684\u3002\u4ee5\u4e0b\u662f\u51e0\u79cd\u65b9\u6cd5\uff1a<\/p>\n

    1. \u4e92\u65a5\u9501<\/strong><\/p>\n

    \u4e92\u65a5\u9501\u662f\u4e00\u79cd\u9501\u673a\u5236\uff0c\u5b83\u5141\u8bb8\u4e00\u6b21\u53ea\u6709\u4e00\u4e2a\u8bf7\u6c42\u8bbf\u95ee\u7f13\u5b58\u4e2d\u7684\u51fd\u6570\u8c03\u7528\u7ed3\u679c\u3002\u53ef\u4ee5\u4f7f\u7528 flock()<\/code> \u51fd\u6570\u6216 Mutex<\/code> \u7c7b\u5b9e\u73b0\u3002<\/p>\n

    \/\/ \u83b7\u5f97\u4e92\u65a5\u9501\n$mutex = new Mutex('\/tmp\/function_cache_lock');\n$mutex->lock();\n\n\/\/ \u8bbf\u95ee\u7f13\u5b58\u5e76\u66f4\u65b0\u7ed3\u679c\n$cache = ...;\n$result = $cache->get($functionName);\nif ($result === false) {\n    $result = call_user_func($functionName);\n    $cache->set($functionName, $result);\n}\n\n\/\/ \u91ca\u653e\u4e92\u65a5\u9501\n$mutex->unlock();<\/pre>\n
    2. \u53cc\u91cd\u68c0\u67e5\u9501<\/strong><\/p>\n
    \u53cc\u91cd\u68c0\u67e5\u9501\u662f\u4e00\u79cd\u4f18\u5316\u8fc7\u7684\u4e92\u65a5\u9501\u5b9e\u73b0\uff0c\u5b83\u5229\u7528 PHP \u7684 lazy loading \u673a\u5236\u3002<\/p>\n
    $cache = ...;\nif (!$cache->has($functionName)) {\n    $mutex = new Mutex('\/tmp\/function_cache_lock');\n    $mutex->lock();\n\n    if (!$cache->has($functionName)) {\n        $result = call_user_func($functionName);\n        $cache->set($functionName, $result);\n    }\n\n    $mutex->unlock();\n}<\/pre>\n
    3. \u961f\u5217<\/strong><\/p>\n
    \u961f\u5217\u662f\u4e00\u79cd\u5148\u8fdb\u5148\u51fa\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u7528\u6765\u5b58\u50a8\u9700\u8981\u5904\u7406\u7684\u51fd\u6570\u8c03\u7528\u3002\u5e76\u53d1\u8bf7\u6c42\u5c06\u88ab\u6dfb\u52a0\u5230\u961f\u5217\u4e2d\uff0c\u7136\u540e\u7531\u4e00\u4e2a\u540e\u53f0\u8fdb\u7a0b\u4f9d\u6b21\u5904\u7406\u3002<\/p>\n
    $queue = new Queue();\n\n\/\/ \u6dfb\u52a0\u51fd\u6570\u8c03\u7528\u5230\u961f\u5217\u4e2d\n$queue->add(['function' => $functionName, 'args' => []]);\n\n\/\/ \u5904\u7406\u961f\u5217\u4e2d\u7684\u51fd\u6570\u8c03\u7528\nwhile (!$queue->isEmpty()) {\n    $job = $queue->pop();\n    $result = call_user_func_array($job['function'], $job['args']);\n    $cache->set($functionName, $result);\n}<\/pre>\n
    \u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n
    \u4ee5\u4e0b\u662f\u7f13\u5b58\u5305\u542b\u590d\u6742\u8ba1\u7b97\u7684\u6590\u6ce2\u90a3\u5951\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n
    <?php\n\/\/ \u4f7f\u7528\u4e92\u65a5\u9501\u7684\u51fd\u6570\u7f13\u5b58\u793a\u4f8b\n\n\/\/ \u5b9a\u4e49\u6590\u6ce2\u90a3\u5951\u51fd\u6570\nfunction fib($n) {\n    return $n < 2 ? $n : fib($n - 1) + fib($n - 2);\n}\n\n\/\/ \u51fd\u6570\u7f13\u5b58\n$cache = new Cache();\n\n\/\/ \u5904\u7406\u8bf7\u6c42\n$n = $_GET['n'];\n$mutex = new Mutex('\/tmp\/cache_fib_lock');\n\n\/\/ \u4f7f\u7528\u4e92\u65a5\u9501\u83b7\u53d6\u548c\u66f4\u65b0\u7f13\u5b58\u4e2d\u7684\u7ed3\u679c\n$mutex->lock();\n$result = $cache->get($n);\nif ($result === false) {\n    $result = fib($n);\n    $cache->set($n, $result);\n}\n$mutex->unlock();\n\n\/\/ \u8f93\u51fa\u7ed3\u679c\necho $result;<\/pre>\n
    \u901a\u8fc7\u4f7f\u7528\u4e0a\u8ff0\u5e76\u53d1\u5904\u7406\u6280\u672f\uff0c\u60a8\u53ef\u4ee5\u786e\u4fdd\u5728\u5e76\u53d1\u73af\u5883\u4e2d\u51fd\u6570\u7f13\u5b58\u7684\u6b63\u786e\u6027\u5e76\u4f18\u5316\u6027\u80fd\u3002<\/p>\n
    \u672c\u7bc7\u5173\u4e8e\u300aphp \u51fd\u6570\u7f13\u5b58\u6280\u672f\u8be6\u89e3\uff1a\u5982\u4f55\u89e3\u51b3\u51fd\u6570\u7f13\u5b58\u6280\u672f\u4e2d\u7684\u5e76\u53d1\u95ee\u9898\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    php \u51fd\u6570\u7f13\u5b58\u6280\u672f\u8be6\u89e3\uff1a\u5982\u4f55\u89e3...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-202405","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202405","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202405"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202405\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}