{"id":30741,"date":"2023-11-01T09:45:42","date_gmt":"2022-12-09T07:28:16","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e8%ae%a1%e7%ae%97%e8%b4%a8%e6%95%b0\/"},"modified":"2025-08-12T20:36:17","modified_gmt":"2025-08-12T12:36:17","slug":"%e3%80%90php%e3%80%91%e8%ae%a1%e7%ae%97%e8%b4%a8%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90php%e3%80%91%e8%ae%a1%e7%ae%97%e8%b4%a8%e6%95%b0\/","title":{"rendered":"\u3010PHP\u3011\u8ba1\u7b97\u8d28\u6570"},"content":{"rendered":"

\u6211\u5c06\u8fd9\u7bc7\u6587\u7ae0\u6574\u7406\u6210\u4e86\u6211\u7684\u5907\u5fd8\u5f55\uff0c\u4ee5\u52a0\u5feb\u7d20\u6570\u8ba1\u7b97\u7684\u901f\u5ea6\u3002<\/p>\n

\u627e\u51fa1\u4e07\u4ee5\u4e0b\u7684\u8d28\u6570\u7684\u4ee3\u7801\u3002<\/h1>\n

(code for finding prime numbers below 10,000)<\/p>\n

\u6700\u521d\u5199\u7684\u4ee3\u7801\u3002<\/h2>\n
$start<\/span> =<\/span> microtime<\/span>(<\/span>true<\/span>);<\/span>\r\nplay<\/span>();<\/span>\r\n$end<\/span> =<\/span> microtime<\/span>(<\/span>true<\/span>);<\/span>\r\nprint<\/span> \"<\/span>\\n<\/span>\"<\/span>.<\/span>'\u51e6\u7406\u6642\u9593 = '<\/span> .<\/span> (<\/span>$end<\/span> -<\/span> $start<\/span>)<\/span> .<\/span> '\u79d2'<\/span>.<\/span>\"<\/span>\\n<\/span>\"<\/span> ;<\/span>\r\n\r\nfunction<\/span> play<\/span>()<\/span>\r\n{<\/span>  \r\n    for<\/span> (<\/span>$i<\/span>=<\/span>max<\/span>(<\/span>$prime<\/span>)<\/span>+<\/span>1<\/span>;<\/span>$i<\/span><<\/span>100000<\/span>;<\/span> $i<\/span>++<\/span>)<\/span> {<\/span>\r\n        if<\/span> (<\/span>checkPrime<\/span>(<\/span>$i<\/span>))<\/span> {<\/span>\r\n          print<\/span> $i<\/span>.<\/span>\"<\/span>\\n<\/span>\"<\/span>;<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfunction<\/span> checkPrime<\/span>(<\/span>$num<\/span>)<\/span>\r\n{<\/span>\r\n    $count<\/span>=<\/span>0<\/span>;<\/span>\r\n    for<\/span> (<\/span>$i<\/span>=<\/span>2<\/span>;<\/span> $i<\/span> <<\/span>$num<\/span> ;<\/span> $i<\/span>++<\/span>)<\/span> {<\/span>\r\n        if<\/span> (<\/span>$num<\/span>%<\/span>$i<\/span>==<\/span>0<\/span>)<\/span> {<\/span>\r\n            return<\/span> false<\/span>;<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n    return<\/span> true<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6211\u53ea\u80fd\u60f3\u5230\u4f7f\u7528\u4e24\u4e2a\u51fd\u6570\u6765\u751f\u6210\u7684\u65b9\u6cd5\u3002<\/p>\n
\u5904\u7406\u65f6\u95f4<\/h2>\n
\u51e6\u7406\u6642\u9593 = 19.969306945801\u79d2\r\n<\/code><\/pre>\n
\u5927\u7ea6\u82b1\u4e8620\u79d2\u7684\u65f6\u95f4\u3002<\/p>\n
\u91cd\u65b0\u4ece\u4e00\u5f00\u59cb\u8003\u8651\u5e76\u91cd\u65b0\u5236\u4f5c<\/h1>\n
\u7d20\u6570\u662f\u53ea\u67091\u548c\u5b83\u672c\u8eab\u4f5c\u4e3a\u7ea6\u6570\u7684\u6570\u5b57\u3002<\/h2>\n
\u5982\u679c\u4e00\u4e2a\u6570\u53ea\u80fd\u88ab1\u548c\u5b83\u81ea\u5df1\u6574\u9664\u4e24\u6b21\uff0c\u90a3\u4e48\u5b83\u5c31\u662f\u7d20\u6570\u3002<\/p>\n
    for<\/span> (<\/span>$i<\/span>=<\/span>1<\/span>;<\/span> $i<\/span> <<\/span>10000<\/span> ;<\/span> $i<\/span>++<\/span>)<\/span> {<\/span>\r\n      \/\/ print $i.\"\\n\";<\/span>\r\n      $yakusuu<\/span>=<\/span>0<\/span>;<\/span>\r\n        for<\/span> (<\/span>$j<\/span>=<\/span>1<\/span>;<\/span> $j<\/span> <=<\/span>$i<\/span> ;<\/span> $j<\/span>++<\/span>)<\/span> {<\/span>\r\n            if<\/span> (<\/span>$i<\/span>%<\/span>$j<\/span>==<\/span>0<\/span>)<\/span> {<\/span>\r\n                $yakusuu<\/span>++<\/span>;<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n        if<\/span> (<\/span>$yakusuu<\/span>==<\/span>2<\/span>)<\/span> {<\/span>\r\n            print<\/span> $i<\/span>.<\/span>\"<\/span>\\n<\/span>\"<\/span>;<\/span>\r\n            \/\/ break;<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
\u5904\u7406\u65f6\u95f4<\/h2>\n
\u51e6\u7406\u6642\u9593 = 1.4896070957184\u79d2\r\n<\/code><\/pre>\n
\u63d0\u9ad8\u901f\u5ea6<\/h1>\n
\u7d20\u6570\u7684\u7ea6\u6570\u53ea\u67091\u548c\u5b83\u672c\u8eab\u3002<\/h2>\n
\u90a3\u5c31\u662f\u53ea\u9700\u8981\u5c06\u5947\u6570\u653e\u5165\u5faa\u73af\u4e2d\u5373\u53ef\uff0c\u5f53\u7136\u8981\u6392\u96642\u3002<\/p>\n
    printf<\/span>(<\/span>'%5d'<\/span>,<\/span>2<\/span>);<\/span>\r\n    for<\/span> (<\/span>$i<\/span>=<\/span>3<\/span>;<\/span> $i<\/span> <<\/span>10000<\/span> ;<\/span> $i<\/span>+=<\/span>2<\/span>)<\/span> {<\/span>\r\n      \/\/ print $i.\"\\n\";<\/span>\r\n      $yakusuu<\/span>=<\/span>0<\/span>;<\/span>\r\n        for<\/span> (<\/span>$j<\/span>=<\/span>3<\/span>;<\/span> $j<\/span> <=<\/span>$i<\/span> ;<\/span> $j<\/span>+=<\/span>2<\/span>)<\/span> {<\/span>\r\n            if<\/span> (<\/span>$i<\/span>%<\/span>$j<\/span>==<\/span>0<\/span>)<\/span> {<\/span>\r\n                $yakusuu<\/span>++<\/span>;<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n        if<\/span> (<\/span>$yakusuu<\/span>==<\/span>1<\/span>)<\/span> {<\/span>\r\n            printf<\/span>(<\/span>'%5d'<\/span>,<\/span>$i<\/span>);<\/span>\r\n            \/\/ break;<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n            print<\/span> \"<\/span>\\n<\/span>\"<\/span>;<\/span>\r\n\r\n\r\n##\u51e6\u7406\u6642\u9593<\/span>\r\n<\/code><\/pre>\n
\u5904\u7406\u65f6\u95f4\u4e3a0.39670991897583\u79d2\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6211\u5c06\u8fd9\u7bc7\u6587\u7ae0\u6574\u7406\u6210\u4e86\u6211\u7684\u5907\u5fd8\u5f55\uff0c\u4ee5\u52a0\u5feb\u7d20\u6570\u8ba1\u7b97\u7684\u901f\u5ea6\u3002 \u627e\u51fa1\u4e07\u4ee5\u4e0b\u7684\u8d28\u6570\u7684\u4ee3\u7801\u3002 (code for fin […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30741","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u3010PHP\u3011\u8ba1\u7b97\u8d28\u6570 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u8ba1\u7b97\u8d28\u6570\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010php\u3011\u8ba1\u7b97\u8d28\u6570\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010PHP\u3011\u8ba1\u7b97\u8d28\u6570\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010PHP\u3011\u8ba1\u7b97\u8d28\u6570\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010php\u3011\u8ba1\u7b97\u8d28\u6570\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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