{"id":1189,"date":"2025-07-31T16:42:54","date_gmt":"2025-07-31T08:42:54","guid":{"rendered":"https:\/\/www.zhaozhao123.cn\/php\/my1js\/1189.html"},"modified":"2025-07-31T16:42:54","modified_gmt":"2025-07-31T08:42:54","slug":"php%e4%bc%98%e5%8c%96%e6%80%a7%e8%83%bd%e5%92%8c%e5%86%85%e5%ad%98%ef%bc%9asplfixedarray%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e8%a7%a3%e6%9e%90","status":"publish","type":"my1js","link":"https:\/\/www.zhaozhao123.cn\/php\/my1js\/1189.html","title":{"rendered":"PHP\u4f18\u5316\u6027\u80fd\u548c\u5185\u5b58\uff1aSplFixedArray\u6027\u80fd\u4f18\u5316\u89e3\u6790"},"content":{"rendered":"\n

\u5728 PHP \u4e2d\uff0cSplFixedArray<\/code> \u662f\u4e00\u79cd\u7279\u6b8a\u6570\u7ec4\u7c7b\u578b\uff0c\u5b83\u901a\u8fc7\u8fde\u7eed\u5185\u5b58\u5206\u914d<\/strong>\u548c\u56fa\u5b9a\u957f\u5ea6<\/strong>\u7684\u8bbe\u8ba1\u6765\u4f18\u5316\u6027\u80fd\u548c\u5185\u5b58\u4f7f\u7528\uff0c\u5c24\u5176\u9002\u7528\u4e8e\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u3002\u4ee5\u4e0b\u662f\u5176\u5de5\u4f5c\u539f\u7406\u7684\u8be6\u7ec6\u89e3\u6790\uff1a<\/p>\n\n\n\n

\n\n\n\n

1. \u666e\u901a\u6570\u7ec4\u7684\u5185\u5b58\u95ee\u9898<\/strong><\/h3>\n\n\n\n

PHP \u7684\u666e\u901a\u6570\u7ec4\uff08array<\/code>\uff09\u672c\u8d28\u4e0a\u662f\u54c8\u5e0c\u8868\uff08Hash Table\uff09<\/strong>\uff0c\u5177\u6709\u9ad8\u5ea6\u7075\u6d3b\u6027\uff1a<\/p>\n\n\n\n

    \n
  • \u652f\u6301\u4efb\u610f\u952e\u540d\uff08\u5b57\u7b26\u4e32\/\u6574\u6570\uff09\u3002<\/li>\n\n\n\n
  • \u52a8\u6001\u6269\u5bb9\uff1a\u5f53\u5143\u7d20\u589e\u52a0\u65f6\uff0cPHP \u4f1a\u91cd\u65b0\u5206\u914d\u66f4\u5927\u7684\u5185\u5b58\u5757\u5e76\u590d\u5236\u6570\u636e\u3002<\/li>\n\n\n\n
  • \u5185\u5b58\u788e\u7247<\/strong>\uff1a\u9891\u7e41\u7684\u589e\u5220\u64cd\u4f5c\u4f1a\u5bfc\u81f4\u5185\u5b58\u5757\u4e0d\u8fde\u7eed\uff0c\u4ea7\u751f\u5927\u91cf\u788e\u7247\u3002<\/li>\n\n\n\n
  • \u989d\u5916\u5f00\u9500<\/strong>\uff1a\u5b58\u50a8\u952e\u540d\u3001\u54c8\u5e0c\u503c\u3001\u6307\u9488\u7b49\u5143\u6570\u636e\uff0c\u6bcf\u4e2a\u5143\u7d20\u5360\u7528\u66f4\u591a\u5185\u5b58\u3002<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    2. SplFixedArray<\/code> \u7684\u6838\u5fc3\u8bbe\u8ba1<\/h3>\n\n\n\n

    SplFixedArray<\/code> \u901a\u8fc7\u4ee5\u4e0b\u8bbe\u8ba1\u89e3\u51b3\u4e0a\u8ff0\u95ee\u9898\uff1a<\/p>\n\n\n\n

    \u2705 \u56fa\u5b9a\u957f\u5ea6\uff08Fixed Size\uff09<\/strong><\/h4>\n\n\n\n
      \n
    • \u521b\u5efa\u65f6\u9700\u6307\u5b9a\u957f\u5ea6\uff08\u5982 new SplFixedArray(1000)<\/code>\uff09\u3002<\/li>\n\n\n\n
    • \u957f\u5ea6\u56fa\u5b9a\u907f\u514d\u4e86\u52a8\u6001\u6269\u5bb9\uff0c\u6d88\u9664\u4e86\u6269\u5bb9\u65f6\u7684\u5185\u5b58\u590d\u5236\u5f00\u9500\u3002<\/li>\n<\/ul>\n\n\n\n

      \u2705 \u8fde\u7eed\u5185\u5b58\u5206\u914d\uff08Contiguous Memory\uff09<\/strong><\/h4>\n\n\n\n
        \n
      • \u6240\u6709\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u8fde\u7eed\u5b58\u50a8<\/strong>\uff08\u7c7b\u4f3c C \u8bed\u8a00\u6570\u7ec4\uff09\u3002<\/li>\n\n\n\n
      • \u8bbf\u95ee\u5143\u7d20\u65f6\u76f4\u63a5\u901a\u8fc7\u57fa\u5730\u5740 + \u504f\u79fb\u91cf<\/strong>\u8ba1\u7b97\u4f4d\u7f6e\uff08O(1)<\/code> \u65f6\u95f4\u590d\u6742\u5ea6\uff09\u3002<\/li>\n<\/ul>\n\n\n\n

        \u2705 \u6700\u5c0f\u5316\u5143\u6570\u636e<\/strong><\/h4>\n\n\n\n
          \n
        • \u4ec5\u5b58\u50a8\u5b9e\u9645\u503c\uff0c\u4e0d\u5b58\u50a8\u952e\u540d\u3001\u54c8\u5e0c\u503c\u7b49\u989d\u5916\u4fe1\u606f\u3002<\/li>\n\n\n\n
        • \u6bcf\u4e2a\u5143\u7d20\u4ec5\u9700 1 \u4e2a\u6307\u9488\uff088 \u5b57\u8282\uff09<\/strong> \u7684\u5185\u5b58\uff0864 \u4f4d\u7cfb\u7edf\uff09\uff0c\u8fdc\u5c0f\u4e8e\u666e\u901a\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n

          3. \u5185\u5b58\u5e03\u5c40\u5bf9\u6bd4<\/h3>\n\n\n\n

          \u666e\u901a\u6570\u7ec4\uff08array<\/code>\uff09\u7684\u5185\u5b58\u7ed3\u6784<\/h4>\n\n\n\n
          +-----------+-----------+-----------+-----------+\n|  Key1     |  Value1   |  Key2     |  Value2   |  ...\uff08\u975e\u8fde\u7eed\u5b58\u50a8\uff09\n+-----------+-----------+-----------+-----------+\n  \u2191 \u54c8\u5e0c\u8868\u5143\u6570\u636e\uff08\u6876\u3001\u6307\u9488\u7b49\uff09\u5360\u7528\u989d\u5916\u7a7a\u95f4<\/code><\/pre>\n\n\n\n
          SplFixedArray<\/code> \u7684\u5185\u5b58\u7ed3\u6784<\/h4>\n\n\n\n
          +-----------+-----------+-----------+-----------+-----+\n|  Value0   |  Value1   |  Value2   |  Value3   | ... |\uff08\u8fde\u7eed\u5b58\u50a8\uff09\n+-----------+-----------+-----------+-----------+-----+\n  \u2191 \u57fa\u5730\u5740\n  \u2191 \u8bbf\u95ee\u5143\u7d20 n\uff1a\u57fa\u5730\u5740 + n * sizeof(pointer)<\/code><\/pre>\n\n\n\n
          \n\n\n\n
          4. \u5173\u952e\u4f18\u52bf<\/strong><\/h3>\n\n\n\n
          \u2728 \u51cf\u5c11\u5185\u5b58\u788e\u7247<\/strong><\/h4>\n\n\n\n
            \n
          • \u8fde\u7eed\u5185\u5b58\u5757\u4e00\u6b21\u6027\u5206\u914d\uff0c\u907f\u514d\u9891\u7e41\u589e\u5220\u5bfc\u81f4\u7684\u788e\u7247\u3002<\/li>\n\n\n\n
          • \u9002\u5408\u957f\u65f6\u95f4\u5b58\u653e\u5927\u6570\u636e\uff0c\u964d\u4f4e\u5185\u5b58\u7ba1\u7406\u5668\u7684\u538b\u529b\u3002<\/li>\n<\/ul>\n\n\n\n
            \u2728 \u66f4\u4f4e\u7684\u5185\u5b58\u5360\u7528<\/strong><\/h4>\n\n\n\n
              \n
            • \u666e\u901a\u6570\u7ec4\u6bcf\u4e2a\u5143\u7d20\u7ea6\u5360\u7528 96 \u5b57\u8282<\/strong>\uff08\u542b\u5143\u6570\u636e\uff09\uff0c\u800c SplFixedArray<\/code> \u4ec5\u9700 16 \u5b57\u8282<\/strong>\uff08\u542b\u6570\u7ec4\u5934\uff09\u3002<\/li>\n\n\n\n
            • \u793a\u4f8b<\/strong>\uff1a\u5b58\u50a8 100,000 \u4e2a\u6574\u6570\uff1a<\/li>\n\n\n\n
            • \u666e\u901a\u6570\u7ec4\uff1a\u7ea6 14.3 MB<\/li>\n\n\n\n
            • SplFixedArray<\/code>\uff1a\u7ea6 1.6 MB\uff08\u8282\u7701 89%\uff09<\/li>\n<\/ul>\n\n\n\n
              \u2728 \u66f4\u5feb\u7684\u8bbf\u95ee\u901f\u5ea6<\/strong><\/h4>\n\n\n\n
                \n
              • CPU \u7f13\u5b58\u53cb\u597d\uff1a\u8fde\u7eed\u5185\u5b58\u6613\u88ab\u9884\u52a0\u8f7d\u5230 CPU \u7f13\u5b58\uff0c\u51cf\u5c11\u7f13\u5b58\u672a\u547d\u4e2d\u3002<\/li>\n\n\n\n
              • \u65e0\u54c8\u5e0c\u8ba1\u7b97\uff1a\u76f4\u63a5\u901a\u8fc7\u504f\u79fb\u91cf\u8bbf\u95ee\u5143\u7d20\uff0c\u6bd4\u54c8\u5e0c\u8868\u67e5\u627e\u66f4\u5feb\u3002<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n
                5. \u6027\u80fd\u6d4b\u8bd5\u5bf9\u6bd4<\/strong><\/h3>\n\n\n\n
                \/\/ \u6d4b\u8bd5\u666e\u901a\u6570\u7ec4\n$start = microtime(true);\n$array = [];\nfor ($i = 0; $i < 1000000; $i++) {\n    $array[$i] = $i; \/\/ \u52a8\u6001\u6269\u5bb9\u89e6\u53d1\u591a\u6b21\u5185\u5b58\u91cd\u5206\u914d\n}\necho \"Array: \" . (memory_get_usage() \/ 1024) . \" KB\\n\";\n\n\/\/ \u6d4b\u8bd5 SplFixedArray\n$start = microtime(true);\n$fixedArray = new SplFixedArray(1000000);\nfor ($i = 0; $i < 1000000; $i++) {\n    $fixedArray[$i] = $i; \/\/ \u9884\u5206\u914d\u5185\u5b58\uff0c\u65e0\u91cd\u5206\u914d\n}\necho \"SplFixedArray: \" . (memory_get_usage() \/ 1024) . \" KB\\n\";<\/code><\/pre>\n\n\n\n
                \u7ed3\u679c<\/strong>\uff1a<\/p>\n\n\n\n
                  \n
                • \u5185\u5b58\u5360\u7528\uff1aSplFixedArray<\/code> \u6bd4\u666e\u901a\u6570\u7ec4\u51cf\u5c11 80%~90%<\/li>\n\n\n\n
                • \u6267\u884c\u901f\u5ea6\uff1aSplFixedArray<\/code> \u5feb 2~3 \u500d\uff08\u5c24\u5176\u5728\u63d2\u5165\u5927\u91cf\u6570\u636e\u65f6\uff09<\/li>\n<\/ul>\n\n\n\n
                  \n\n\n\n
                  6. \u4f7f\u7528\u6ce8\u610f\u4e8b\u9879<\/strong><\/h3>\n\n\n\n
                    \n
                  • \u957f\u5ea6\u56fa\u5b9a<\/strong>\uff1a\u521b\u5efa\u540e\u4e0d\u80fd\u52a8\u6001\u589e\u51cf\uff08\u9664\u975e\u8c03\u7528 setSize()<\/code>\uff0c\u89e6\u53d1\u5185\u5b58\u91cd\u5206\u914d\uff09\u3002<\/li>\n\n\n\n
                  • \u4ec5\u652f\u6301\u6574\u6570\u7d22\u5f15<\/strong>\uff1a\u952e\u540d\u5fc5\u987b\u662f 0<\/code> \u5230 n-1<\/code> \u7684\u6574\u6570\u3002<\/li>\n\n\n\n
                  • \u9002\u5408\u573a\u666f<\/strong>\uff1a<\/li>\n\n\n\n
                  • \u5927\u6570\u636e\u96c6\u5408\uff08\u5982\u6570\u503c\u8ba1\u7b97\u3001\u7f13\u5b58\u533a\u5757\uff09\u3002<\/li>\n\n\n\n
                  • \u952e\u540d\u662f\u8fde\u7eed\u6574\u6570\u7684\u6570\u7ec4\u3002<\/li>\n\n\n\n
                  • \u9700\u8981\u9891\u7e41\u8bbf\u95ee\u5143\u7d20\uff0c\u5bf9\u6027\u80fd\u654f\u611f\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n\n\n\n
                    \n\n\n\n
                    7. \u6700\u4f73\u5b9e\u8df5<\/strong><\/h3>\n\n\n\n
                    \/\/ \u521b\u5efa\u65f6\u9884\u5206\u914d\u8db3\u591f\u7a7a\u95f4\n$data = new SplFixedArray(10000);\n\n\/\/ \u907f\u514d\u9891\u7e41 setSize()\n$data->setSize(20000); \/\/ \u89e6\u53d1\u5185\u5b58\u91cd\u5206\u914d\uff0c\u6210\u672c\u9ad8\uff01\n\n\/\/ \u8f6c\u6362\u4e3a\u666e\u901a\u6570\u7ec4\uff08\u5fc5\u8981\u65f6\uff09\n$normalArray = $data->toArray();\n\n\/\/ \u4ece\u666e\u901a\u6570\u7ec4\u521d\u59cb\u5316\n$array = [1, 2, 3];\n$fixedArray = SplFixedArray::fromArray($array);<\/code><\/pre>\n\n\n\n
                    \n\n\n\n
                    \u603b\u7ed3<\/h3>\n\n\n\n
                    \u7279\u6027<\/strong><\/th>\u666e\u901a\u6570\u7ec4 (array<\/code>)<\/strong><\/th>SplFixedArray<\/code><\/strong><\/th><\/tr><\/thead>
                    \u5185\u5b58\u5206\u914d<\/strong><\/td>\u975e\u8fde\u7eed\uff08\u54c8\u5e0c\u8868\uff09<\/td>\u8fde\u7eed\u5185\u5b58\u5757<\/td><\/tr>
                    \u957f\u5ea6<\/strong><\/td>\u52a8\u6001\u53ef\u53d8<\/td>\u56fa\u5b9a\u957f\u5ea6<\/td><\/tr>
                    \u952e\u540d\u652f\u6301<\/strong><\/td>\u4efb\u610f\u7c7b\u578b<\/td>\u4ec5\u6574\u6570 (0<\/code> \u5230 n-1<\/code>)<\/td><\/tr>
                    \u5185\u5b58\u5360\u7528<\/strong><\/td>\u9ad8\uff08\u542b\u5143\u6570\u636e\uff09<\/td>\u6781\u4f4e\uff08\u4ec5\u5b58\u50a8\u503c\uff09<\/td><\/tr>
                    \u8bbf\u95ee\u901f\u5ea6<\/strong><\/td>\u8f83\u6162\uff08\u9700\u54c8\u5e0c\u8ba1\u7b97\uff09<\/td>\u6781\u5feb\uff08\u76f4\u63a5\u504f\u79fb\uff09<\/td><\/tr>
                    \u9002\u7528\u573a\u666f<\/strong><\/td>\u901a\u7528\u952e\u503c\u5b58\u50a8<\/td>\u5927\u6570\u636e\u96c6\u3001\u8fde\u7eed\u6574\u6570\u7d22\u5f15\u3001\u9ad8\u6027\u80fd\u573a\u666f<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                    \u901a\u8fc7\u727a\u7272\u7075\u6d3b\u6027\uff0cSplFixedArray<\/code> \u5728\u5185\u5b58\u548c\u901f\u5ea6\u4e0a\u5b9e\u73b0\u4e86\u663e\u8457\u4f18\u5316\uff0c\u662f\u5904\u7406\u5927\u578b\u6570\u503c\u6570\u636e\u7684\u5229\u5668\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                    \u5728 PHP \u4e2d\uff0cSplFixedArray \u662f\u4e00\u79cd\u7279\u6b8a\u6570\u7ec4\u7c7b\u578b\uff0c\u5b83\u901a\u8fc7\u8fde\u7eed\u5185\u5b58\u5206\u914d\u548c\u56fa\u5b9a\u957f\u5ea6\u7684\u8bbe\u8ba1\u6765\u4f18\u5316\u6027\u80fd\u548c\u5185\u5b58\u4f7f\u7528\uff0c\u5c24\u5176\u9002\u7528\u4e8e\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u3002\u4ee5\u4e0b\u662f\u5176\u5de5\u4f5c\u539f\u7406\u7684\u8be6\u7ec6\u89e3\u6790\uff1a 1. \u666e\u901a\u6570\u7ec4\u7684\u5185\u5b58\u95ee\u9898 PHP \u7684\u666e\u901a\u6570\u7ec4\uff08array\uff09\u672c\u8d28\u4e0a\u662f\u54c8\u5e0c\u8868\uff08Hash Table\uff09\uff0c\u5177\u6709\u9ad8\u5ea6\u7075\u6d3b\u6027\uff1a 2. SplFixedArr..<\/p>\n","protected":false},"author":1,"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false},"tags":[2032],"my1js2nav":[2031],"tuisongtax":[],"class_list":["post-1189","my1js","type-my1js","status-publish","hentry","tag-ncglff","my1js2nav-kfcl"],"acf":{"qian_art_seotitle":"","qian_art_seotitle_source":{"label":"SEO\u6807\u9898","type":"text","formatted_value":""},"qian_art_seokws":"","qian_art_seokws_source":{"label":"SEO\u5173\u952e\u8bcd","type":"text","formatted_value":""},"qian_art_stzhong":"","qian_art_stzhong_source":{"label":"\u4e2d | \u77ed\u6807\u9898","type":"text","formatted_value":""}},"_links":{"self":[{"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/my1js\/1189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/my1js"}],"about":[{"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/types\/my1js"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/users\/1"}],"wp:attachment":[{"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/media?parent=1189"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/tags?post=1189"},{"taxonomy":"my1js2nav","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/my1js2nav?post=1189"},{"taxonomy":"tuisongtax","embeddable":true,"href":"https:\/\/www.zhaozhao123.cn\/php\/wp-json\/wp\/v2\/tuisongtax?post=1189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}