{"id":30813,"date":"2023-11-02T16:59:16","date_gmt":"2023-10-04T09:03:37","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8php%e8%bf%9b%e8%a1%8c%e6%95%b4%e6%95%b0%e7%9a%84%e9%99%a4%e6%b3%95-2\/"},"modified":"2025-08-12T20:56:06","modified_gmt":"2025-08-12T12:56:06","slug":"%e7%94%a8php%e8%bf%9b%e8%a1%8c%e6%95%b4%e6%95%b0%e7%9a%84%e9%99%a4%e6%b3%95-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8php%e8%bf%9b%e8%a1%8c%e6%95%b4%e6%95%b0%e7%9a%84%e9%99%a4%e6%b3%95-2\/","title":{"rendered":"\u7528PHP\u8fdb\u884c\u6574\u6570\u7684\u9664\u6cd5"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u6ce8\u610f\u4e8b\u9879\uff1a\u5f53\u5728PHP\u4e2d\u8fdb\u884c\u6574\u6570\u9664\u6cd5\u65f6\uff08\u65e0\u6cd5\u6574\u9664\u65f6\uff0c\u5c06\u4f1a\u820d\u5f03\u5c0f\u6570\u90e8\u5206\uff09\uff0c\u8bf7\u6ce8\u610f\u8981\u83b7\u5f97\u6b64\u7c7b\u7ed3\u679c\u3002<\/p>\n

\u7ed3\u8bba\u3002<\/h1>\n

\u5982\u679c\u4f7f\u7528PHP7\u53ca\u66f4\u9ad8\u7248\u672c\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528intdiv($x, $y)\u3002<\/p>\n

\u5982\u679c\u662fPHP5.6\uff0c\u6700\u597d\u5c06($x – ($x % y)) \/ $y\u7b49\u4e8e\u8fd9\u4e2a\u503c\u3002<\/p>\n

\u7ecf\u5e38\u88ab\u4ecb\u7ecd\u7684intval\uff08$ x \/ $ y\uff09\u6709\u65f6\u4f1a\u4ea7\u751f\u9519\u8bef\u7684\u503c\u3002<\/p>\n

\u8bf4\u660e (ji\u011b shu\u014d)<\/h1>\n

\u4e3a\u4ec0\u4e48intval($x \/ $y)\u4e0d\u884c\u5462\uff1f<\/h2>\n

\u5728PHP\u7684\u8fd0\u7b97\u7b26\u8bf4\u660e\u4e2d\uff0c\u5199\u7740\u4ee5\u4e0b\u8fd9\u6837\u7684\u89e3\u91ca\u3002\uff08\u4ee3\u6570\u8fd0\u7b97\u7b26\uff09<\/p>\n

\u9664\u7b97\u8fd0\u7b97\u7b26 (“\/”) \u8fd4\u56de\u7684\u503c\u5c06\u662f\u6d6e\u70b9\u6570\u3002\u4f46\u662f\uff0c\u5982\u679c\u4e24\u4e2a\u64cd\u4f5c\u6570\u90fd\u662f\u6574\u6570\uff08\u6216\u53ef\u4ee5\u8f6c\u6362\u4e3a\u6574\u6570\u7684\u5b57\u7b26\u4e32\uff09\uff0c\u4e14\u7ed3\u679c\u80fd\u6574\u9664\uff0c\u5219\u8fd4\u56de\u6574\u6570\u503c\u3002\u6709\u5173\u6574\u6570\u9664\u6cd5\uff0c\u8bf7\u53c2\u9605 intdiv()\u3002<\/p><\/blockquote>\n

\u7531\u4e8ePHP\u7684\u6d6e\u70b9\u6570\u6bd4\u6574\u6570\u7cbe\u5ea6\u4f4e\uff0c\u6bd4\u5982\u5c069999999999999999\uff089\u4e3a16\u4f4d\u6570\uff09\u9664\u4ee510\u5f97\u5230\u4f59\u6570\u4e3a999999999999999\uff089\u4e3a15\u4f4d\u6570\uff09\uff0c\u4f46\u5b9e\u9645\u7ed3\u679c\u5e76\u975e\u5982\u6b64\u3002<\/p>\n

% php -r 'var_dump(9999999999999999 \/ 10);<\/span>'\r\n<\/span>float(1.0E+15)\r\n<\/span>% php -r 'var_dump(intval(9999999999999999 \/ 10));<\/span>'\r\n<\/span>int(1000000000000000)\r\n<\/span><\/code><\/pre>\n
\u5728\u6574\u6570\u90e8\u5206\u7684\u9664\u6cd5\u9636\u6bb5\uff0c\u7531\u4e8e\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u65e0\u6cd5\u5904\u7406\uff0c\u7ed3\u679c\u88ab\u820d\u5165\u4e86\uff0c\u6240\u4ee5\u65e0\u6cd5\u6b63\u786e\u5730\u5c06\u5c0f\u6570\u70b9\u4ee5\u4e0b\u7684\u503c\u622a\u65ad\u3002<\/p>\n
\u6574\u9664\u51fd\u6570<\/h2>\n
\u7531\u4e8e\u6d6e\u70b9\u6570\u8fd0\u7b97\u4f1a\u5f15\u8d77\u5404\u79cd\u9ebb\u70e6\uff0c\u56e0\u6b64\u5728PHP7\u4e2d\u65b0\u6dfb\u52a0\u4e86\u4e00\u4e2a\u540d\u4e3aintdiv\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u6267\u884c\u6574\u6570\u8fd0\u7b97\uff0c\u7b80\u5355\u76f4\u63a5\u3002<\/p>\n
% php -r 'var_dump(intdiv(9999999999999999, 10));<\/span>'\r\n<\/span>int(999999999999999)\r\n<\/span><\/code><\/pre>\n
\u8fd9\u662f\u4e3a\u6b64\u76ee\u7684\u800c\u8bbe\u8ba1\u7684\uff0c\u6240\u4ee5\u6ca1\u6709\u95ee\u9898\u3002<\/p>\n
\u5728\u6ca1\u6709intdiv\u51fd\u6570\u76845.6\u7248\u672c\u4e2d\u600e\u4e48\u529e\uff1f<\/h2>\n
\u7531\u4e8e\u6ca1\u6709intdiv\uff0c\u6211\u4eec\u53ea\u80fd\u60f3\u529e\u6cd5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\/ \u8fd0\u7b97\u7b26\u5728\u53ef\u4ee5\u6574\u9664\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\u6574\u6570\u8fd0\u7b97\uff0c\u6240\u4ee5\u5982\u679c\u4e8b\u5148\u901a\u8fc7\u51cf\u6cd5\u53bb\u9664\u4f59\u6570\u4f7f\u5176\u80fd\u591f\u88ab\u6574\u9664\uff0c\u8ba1\u7b97\u5c06\u4f1a\u6b63\u786e\u3002<\/p>\n
% php -r 'var_dump(9999999999999990 \/ 10);<\/span>'\r\n<\/span>int(999999999999999)\r\n<\/span><\/code><\/pre>\n
\u5982\u679c\u4ee5($x – ($x % y)) \/ $y\u7684\u5f62\u5f0f\u6765\u603b\u7ed3\uff0c\u5c06\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002<\/p>\n
\u66f4\u8be6\u7ec6\u4e00\u4e9b<\/h1>\n
\u201c\u867d\u7136\u8bf4\u5f53\u53ef\u4ee5\u6574\u9664\u65f6\u4f1a\u8fd4\u56de\u6574\u6570\u503c\uff0c\u4f46\u53ef\u80fd\u4f1a\u6709\u4eba\u6307\u51fa\u6ca1\u6709\u63d0\u53ca\u4e2d\u95f4\u8ba1\u7b97\u7684\u60c5\u51b5\uff0c\u6240\u4ee5\u4e3a\u4e86\u786e\u8ba4\uff0c\u8bf7\u68c0\u67e5\u6e90\u4ee3\u7801\u3002\u6267\u884c\u9664\u6cd5\u8fd0\u7b97\u7684\u662fZend\/zend_operators.c\u4e2d\u7684div_function()\u51fd\u6570\u3002\u5f53\u4e24\u4e2a\u6574\u6570\u8fdb\u884c\u8fd0\u7b97\u65f6\uff0c\u6267\u884c\u7684\u90e8\u5206\u662f\u8fd9\u6837\u7684\u3002\u201d<\/p>\n
            case<\/span> TYPE_PAIR<\/span>(<\/span>IS_LONG<\/span>,<\/span> IS_LONG<\/span>)<\/span>:<\/span>\r\n                if<\/span> (<\/span>Z_LVAL_P<\/span>(<\/span>op2<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>\r\n                    zend_error<\/span>(<\/span>E_WARNING<\/span>,<\/span> \"Division by zero\"<\/span>);<\/span>\r\n                    ZVAL_DOUBLE<\/span>(<\/span>result<\/span>,<\/span> ((<\/span>double<\/span>)<\/span> Z_LVAL_P<\/span>(<\/span>op1<\/span>)<\/span> \/<\/span> (<\/span>double<\/span>)<\/span> Z_LVAL_P<\/span>(<\/span>op2<\/span>)));<\/span>\r\n                    return<\/span> SUCCESS<\/span>;<\/span>\r\n                }<\/span> else<\/span> if<\/span> (<\/span>Z_LVAL_P<\/span>(<\/span>op2<\/span>)<\/span> ==<\/span> -<\/span>1<\/span> &&<\/span> Z_LVAL_P<\/span>(<\/span>op1<\/span>)<\/span> ==<\/span> ZEND_LONG_MIN<\/span>)<\/span> {<\/span>\r\n                    \/* Prevent overflow error\/crash *\/<\/span>\r\n                    ZVAL_DOUBLE<\/span>(<\/span>result<\/span>,<\/span> (<\/span>double<\/span>)<\/span> ZEND_LONG_MIN<\/span> \/<\/span> -<\/span>1<\/span>);<\/span>\r\n                    return<\/span> SUCCESS<\/span>;<\/span>\r\n                }<\/span>\r\n                if<\/span> (<\/span>Z_LVAL_P<\/span>(<\/span>op1<\/span>)<\/span> %<\/span> Z_LVAL_P<\/span>(<\/span>op2<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span> \/* integer *\/<\/span>\r\n                    ZVAL_LONG<\/span>(<\/span>result<\/span>,<\/span> Z_LVAL_P<\/span>(<\/span>op1<\/span>)<\/span> \/<\/span> Z_LVAL_P<\/span>(<\/span>op2<\/span>));<\/span>\r\n                }<\/span> else<\/span> {<\/span>\r\n                    ZVAL_DOUBLE<\/span>(<\/span>result<\/span>,<\/span> ((<\/span>double<\/span>)<\/span> Z_LVAL_P<\/span>(<\/span>op1<\/span>))<\/span> \/<\/span> Z_LVAL_P<\/span>(<\/span>op2<\/span>));<\/span>\r\n                }<\/span>\r\n                return<\/span> SUCCESS<\/span>;<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728\u6b64\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u770b\u5230\u5f53\u80fd\u6574\u9664\u65f6\uff0c\u4f7f\u7528\u6574\u6570\u9664\u6cd5\uff0c\u65e0\u6cd5\u6574\u9664\u65f6\u5219\u5c06\u5176\u8f6c\u6362\u4e3a\u6d6e\u70b9\u6570\u5e76\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\uff08\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5e76\u4e0d\u6784\u6210\u95ee\u9898\uff0c\u4f46\u662f\u5728C\u4e2d\uff0c\u6574\u6570\u76f8\u9664\u5c06\u820d\u5f03\u5c0f\u6570\u90e8\u5206\uff08\u54110\u65b9\u5411\u53d6\u6574\uff09\u4f5c\u4e3a\u6570\u5b66\u5546\uff0c\u8fd9\u662fC\u7684\u89c4\u5b9a\uff09\u3002<\/p>\n
\u6574\u578b\u7684\u6700\u5c0f\u503c(PHP_INT_MIN)\u9664\u4ee5-1\u5f97\u5230\u4e00\u4e2a\u8d85\u51fa\u6574\u6570\u8303\u56f4\u7684\u7ed3\u679c\uff0c\u56e0\u6b64\u7279\u6b8a\u5904\u7406\u4e86\u8fd9\u79cd\u60c5\u51b5\uff0c\u8fd9\u611f\u89c9\u5f88\u660e\u663e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148 \u6ce8\u610f\u4e8b\u9879\uff1a\u5f53\u5728PHP\u4e2d\u8fdb\u884c\u6574\u6570\u9664\u6cd5\u65f6\uff08\u65e0\u6cd5\u6574\u9664\u65f6\uff0c\u5c06\u4f1a\u820d\u5f03\u5c0f\u6570\u90e8\u5206\uff09\uff0c\u8bf7\u6ce8\u610f\u8981\u83b7\u5f97\u6b64\u7c7b\u7ed3\u679c\u3002 \u7ed3\u8bba\u3002 \u5982 […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30813","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u7528PHP\u8fdb\u884c\u6574\u6570\u7684\u9664\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u7528PHP\u8fdb\u884c\u6574\u6570\u7684\u9664\u6cd5\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\/\u7528php\u8fdb\u884c\u6574\u6570\u7684\u9664\u6cd5-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u7528PHP\u8fdb\u884c\u6574\u6570\u7684\u9664\u6cd5\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u7528PHP\u8fdb\u884c\u6574\u6570\u7684\u9664\u6cd5\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7528php\u8fdb\u884c\u6574\u6570\u7684\u9664\u6cd5-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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