{"id":46931,"date":"2024-12-02T16:53:49","date_gmt":"2024-12-02T08:53:49","guid":{"rendered":"https:\/\/fwq.ai\/blog\/46931\/"},"modified":"2024-12-02T16:53:49","modified_gmt":"2024-12-02T08:53:49","slug":"php-%e5%87%bd%e6%95%b0%e7%9a%84%e6%80%a7%e8%83%bd%e6%b5%8b%e8%af%95%e6%96%b9%e6%b3%95%e5%92%8c%e6%8c%87%e6%a0%87","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/46931\/","title":{"rendered":"PHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>PHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807<\/h1>\n<p>\u5c0f\u4f19\u4f34\u4eec\u6709\u6ca1\u6709\u89c9\u5f97\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u5f88\u6709\u610f\u601d\uff1f\u6709\u610f\u601d\u5c31\u5bf9\u4e86\uff01\u4eca\u5929\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aPHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u5728\u5b66\u4e60\u4e2d\u5bf9\u5176\u4e2d\u90e8\u5206\u77e5\u8bc6\u70b9\u6709\u7591\u95ee\uff0c\u6216\u8bb8\u770b\u4e86\u672c\u6587\u5c31\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n<p>PHP \u51fd\u6570\u6027\u80fd\u6d4b\u8bd5\u6d89\u53ca\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u57fa\u51c6\u6d4b\u8bd5\u3001\u538b\u529b\u6d4b\u8bd5\u3001\u6027\u80fd\u5256\u6790\u3002\u6307\u6807\u5305\u62ec\u6267\u884c\u65f6\u95f4\u3001\u5185\u5b58\u6d88\u8017\u3001\u541e\u5410\u91cf\u548c\u54cd\u5e94\u65f6\u95f4\u3002\u901a\u8fc7\u57fa\u51c6\u6d4b\u8bd5\uff0c\u6211\u4eec\u53d1\u73b0\u5b57\u7b26\u4e32\u53cd\u8f6c\u65f6\u95f4\u968f\u957f\u5ea6\u589e\u52a0\u800c\u663e\u8457\u589e\u52a0\uff1a100 \u5b57\u7b26 0.000003 \u79d2\uff0c1000 \u5b57\u7b26 0.000008 \u79d2\uff0c10000 \u5b57\u7b26 0.000066 \u79d2\uff0c100000 \u5b57\u7b26 0.001932 \u79d2\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241025\/1729855238671b7f064f759.jpg\" class=\"aligncenter\" title=\"PHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807\u63d2\u56fe\" alt=\"PHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807\u63d2\u56fe\" \/><\/p>\n<p><strong>PHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807<\/strong><\/p>\n<p><strong>\u7b80\u4ecb<\/strong><\/p>\n<p>\u6027\u80fd\u6d4b\u8bd5\u5bf9\u4e8e\u8bc6\u522b\u548c\u89e3\u51b3\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u6027\u80fd\u74f6\u9888\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u7528\u4e8e\u6d4b\u8bd5 PHP \u51fd\u6570\u6027\u80fd\u7684\u4e0d\u540c\u65b9\u6cd5\u548c\u6307\u6807\u3002<\/p>\n<p><strong>\u65b9\u6cd5<\/strong><\/p>\n<ul>\n<li><strong>\u57fa\u51c6\u6d4b\u8bd5 (Benchmarking)\uff1a<\/strong>\u6bd4\u8f83\u4e0d\u540c\u5b9e\u73b0\u6216\u53c2\u6570\u7684\u6267\u884c\u65f6\u95f4\u3002<\/li>\n<li><strong>\u538b\u529b\u6d4b\u8bd5\uff1a<\/strong>\u901a\u8fc7\u589e\u52a0\u8d1f\u8f7d\u6765\u6d4b\u8bd5\u7cfb\u7edf\u7684\u6781\u9650\u3002<\/li>\n<li><strong>\u6027\u80fd\u5256\u6790 (Profiling)\uff1a<\/strong>\u5206\u6790\u4ee3\u7801\u4ee5\u627e\u51fa\u6027\u80fd\u74f6\u9888\u3002<\/li>\n<\/ul>\n<p><strong>\u6307\u6807<\/strong><\/p>\n<ul>\n<li><strong>\u6267\u884c\u65f6\u95f4\uff1a<\/strong>\u51fd\u6570\u6267\u884c\u6240\u9700\u7684\u65f6\u95f4\u3002<\/li>\n<li><strong>\u5185\u5b58\u6d88\u8017\uff1a<\/strong>\u51fd\u6570\u6267\u884c\u671f\u95f4\u5206\u914d\u7684\u5185\u5b58\u91cf\u3002<\/li>\n<li><strong>\u5cf0\u503c\u5185\u5b58\u4f7f\u7528\u91cf\uff1a<\/strong>\u5728\u51fd\u6570\u6267\u884c\u671f\u95f4\u4f7f\u7528\u7684\u6700\u5927\u5185\u5b58\u91cf\u3002<\/li>\n<li><strong>\u541e\u5410\u91cf\uff1a<\/strong>\u51fd\u6570\u5728\u5355\u4f4d\u65f6\u95f4\u5185\u5904\u7406\u8bf7\u6c42\u7684\u6570\u91cf\u3002<\/li>\n<li><strong>\u54cd\u5e94\u65f6\u95f4\uff1a<\/strong>\u5ba2\u6237\u7aef\u6536\u5230\u54cd\u5e94\u6240\u9700\u7684\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5b57\u7b26\u4e32\u53cd\u8f6c\u51fd\u6570 <code>reverseString<\/code>\uff1a<\/p>\n<pre>function reverseString($string) {\n  return strrev($string);\n}<\/pre>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 <code>microtime()<\/code> \u51fd\u6570\u6765\u6bd4\u8f83\u4e0d\u540c\u957f\u5ea6\u5b57\u7b26\u4e32\u7684\u53cd\u8f6c\u65f6\u95f4\uff1a<\/p>\n<pre>$lengths = [100, 1000, 10000, 100000];\nforeach ($lengths as $length) {\n  $startTime = microtime(true);\n  reverseString(str_repeat('a', $length));\n  $endTime = microtime(true);\n  echo \"Length: $length, Time: \" . ($endTime - $startTime) . \" seconds\\n\";\n}<\/pre>\n<p><strong>\u7ed3\u679c<\/strong><\/p>\n<pre>Length: 100, Time: 0.000003 seconds\nLength: 1000, Time: 0.000008 seconds\nLength: 10000, Time: 0.000066 seconds\nLength: 100000, Time: 0.001932 seconds<\/pre>\n<p>\u7ed3\u679c\u663e\u793a\uff0c\u968f\u7740\u5b57\u7b26\u4e32\u957f\u5ea6\u7684\u589e\u52a0\uff0c\u53cd\u8f6c\u65f6\u95f4\u663e\u8457\u589e\u52a0\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aPHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807 \u5c0f\u4f19\u4f34\u4eec\u6709\u6ca1\u6709\u89c9\u5f97\u5b66\u4e60\u6587\u7ae0\u5f88\u6709\u610f\u601d\uff1f\u6709\u610f\u601d\u5c31\u5bf9\u4e86\uff01\u4eca\u5929\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765\u300aPHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807\u300b\uff0c\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230\uff0c\u82e5\u662f\u5728\u5b66\u4e60\u4e2d\u5bf9\u5176\u4e2d\u90e8\u5206\u77e5\u8bc6\u70b9\u6709\u7591\u95ee\uff0c\u6216\u8bb8\u770b\u4e86\u672c\u6587\u5c31\u80fd\u5e2e\u5230\u4f60\uff01 PHP \u51fd\u6570\u6027\u80fd\u6d4b\u8bd5\u6d89\u53ca\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u57fa\u51c6\u6d4b\u8bd5\u3001\u538b\u529b\u6d4b\u8bd5\u3001\u6027\u80fd\u5256\u6790\u3002\u6307\u6807\u5305\u62ec\u6267\u884c\u65f6\u95f4\u3001\u5185\u5b58\u6d88\u8017\u3001\u541e\u5410\u91cf\u548c\u54cd\u5e94\u65f6\u95f4\u3002\u901a\u8fc7\u57fa\u51c6\u6d4b\u8bd5\uff0c\u6211\u4eec\u53d1\u73b0\u5b57\u7b26\u4e32\u53cd\u8f6c\u65f6\u95f4\u968f\u957f\u5ea6\u589e\u52a0\u800c\u663e\u8457\u589e\u52a0\uff1a100 \u5b57\u7b26 0.000003 \u79d2\uff0c1000 \u5b57\u7b26 0.000008 \u79d2\uff0c10000 \u5b57\u7b26 0.000066 \u79d2\uff0c100000 \u5b57\u7b26 0.001932 \u79d2\u3002 PHP \u51fd\u6570\u7684\u6027\u80fd\u6d4b\u8bd5\u65b9\u6cd5\u548c\u6307\u6807 \u7b80\u4ecb \u6027\u80fd\u6d4b\u8bd5\u5bf9\u4e8e\u8bc6\u522b\u548c\u89e3\u51b3\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u6027\u80fd\u74f6\u9888\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u7528\u4e8e\u6d4b\u8bd5 PHP \u51fd\u6570\u6027\u80fd\u7684\u4e0d\u540c\u65b9\u6cd5\u548c\u6307\u6807\u3002 \u65b9\u6cd5 \u57fa\u51c6\u6d4b\u8bd5 (Benchmarking)\uff1a\u6bd4\u8f83\u4e0d\u540c\u5b9e\u73b0\u6216\u53c2\u6570\u7684\u6267\u884c\u65f6\u95f4\u3002 \u538b\u529b\u6d4b\u8bd5\uff1a\u901a\u8fc7\u589e\u52a0\u8d1f\u8f7d\u6765\u6d4b\u8bd5\u7cfb\u7edf\u7684\u6781\u9650\u3002 \u6027\u80fd\u5256\u6790 (Profiling)\uff1a\u5206\u6790\u4ee3\u7801\u4ee5\u627e\u51fa\u6027\u80fd\u74f6\u9888\u3002 \u6307\u6807 \u6267\u884c\u65f6\u95f4\uff1a\u51fd\u6570\u6267\u884c\u6240\u9700\u7684\u65f6\u95f4\u3002 \u5185\u5b58\u6d88\u8017\uff1a\u51fd\u6570\u6267\u884c\u671f\u95f4\u5206\u914d\u7684\u5185\u5b58\u91cf\u3002 \u5cf0\u503c\u5185\u5b58\u4f7f\u7528\u91cf\uff1a\u5728\u51fd\u6570\u6267\u884c\u671f\u95f4\u4f7f\u7528\u7684\u6700\u5927\u5185\u5b58\u91cf\u3002 \u541e\u5410\u91cf\uff1a\u51fd\u6570\u5728\u5355\u4f4d\u65f6\u95f4\u5185\u5904\u7406\u8bf7\u6c42\u7684\u6570\u91cf\u3002 \u54cd\u5e94\u65f6\u95f4\uff1a\u5ba2\u6237\u7aef\u6536\u5230\u54cd\u5e94\u6240\u9700\u7684\u65f6\u95f4\u3002 \u5b9e\u6218\u6848\u4f8b \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5b57\u7b26\u4e32\u53cd\u8f6c\u51fd\u6570 reverseString\uff1a function reverseString($string) { return strrev($string); } \u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 microtime() \u51fd\u6570\u6765\u6bd4\u8f83\u4e0d\u540c\u957f\u5ea6\u5b57\u7b26\u4e32\u7684\u53cd\u8f6c\u65f6\u95f4\uff1a $lengths = [100, 1000, 10000, 100000]; foreach [&hellip;]<\/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-46931","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46931","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=46931"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46931\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=46931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=46931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=46931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}