{"id":2147,"date":"2022-09-26T18:06:06","date_gmt":"2022-09-26T10:06:06","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=2147"},"modified":"2024-11-22T14:30:23","modified_gmt":"2024-11-22T06:30:23","slug":"php%e5%b8%b8%e9%87%8f%e3%80%81%e8%bf%90%e7%ae%97%e7%ac%a6%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/server\/php%e5%b8%b8%e9%87%8f%e3%80%81%e8%bf%90%e7%ae%97%e7%ac%a6%e6%95%99%e7%a8%8b\/","title":{"rendered":"PHP\u5e38\u91cf\u3001\u8fd0\u7b97\u7b26\u6559\u7a0b"},"content":{"rendered":"

hostease\u7f8e\u56fd\u670d\u52a1\u5668\u5546<\/strong><\/a>\u5206\u4eabPHP\u5e38\u91cf\u3001\u8fd0\u7b97\u7b26\u6559\u7a0b<\/p>\n

PHP \u5e38\u91cf<\/p>\n

\u5b9a\u4e49\u5e38\u91cf\u2014\u2014\u5e38\u91cf\u662f\u4e00\u4e2a\u53d8\u91cf\uff0c\u5176\u503c\u5728\u8fd0\u884c\u65f6\u4e0d\u80fd\u66f4\u6539\u3002<\/p>\n

\u5047\u8bbe\u6211\u4eec\u6b63\u5728\u5f00\u53d1\u4e00\u4e2a\u4f7f\u7528 PI 3.14 \u503c\u7684\u7a0b\u5e8f\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5e38\u91cf\u6765\u5b58\u50a8\u5b83\u7684\u503c\u3002\u63a8\u8350\u9605\u8bfb\uff1a\u300a \u4ec0\u4e48\u662fPHP? \u300b<\/a><\/p>\n

\u73b0\u5728\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u5b9a\u4e49\u5e38\u91cf\u7684\u793a\u4f8b\u3002\u5b9a\u4e49(‘PI’\uff0c3.14);\/\/\u521b\u5efa\u4e00\u4e2a\u503c\u4e3a 3.14 \u7684\u5e38\u91cf\u4e00\u65e6\u5c06 PI \u5b9a\u4e49\u4e3a 3.14 \uff0c\u7f16\u5199\u5982\u4e0b\u4ee3\u7801\u5c06\u751f\u6210\u9519\u8bef PI = 4; \/\/PI \u5df2\u88ab\u5b9a\u4e49\u4e3a\u5e38\u91cf\uff0c\u56e0\u6b64\u4e0d\u5141\u8bb8\u8d4b\u503c\u3002<\/p>\n

PHP\u8fd0\u7b97\u7b26<\/p>\n

\u7b97\u672f\u8fd0\u7b97\u7b26<\/p>\n

\u7b97\u672f\u8fd0\u7b97\u7b26\u7528\u4e8e\u5bf9\u6570\u503c\u6570\u636e\u6267\u884c\u7b97\u672f\u8fd0\u7b97\u3002\u8fde\u63a5\u8fd0\u7b97\u7b26\u4e5f\u9002\u7528\u4e8e\u5b57\u7b26\u4e32\u503c\u3002PHP \u652f\u6301\u4ee5\u4e0b\u8fd0\u7b97\u7b26\u3002<\/p>\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
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\u64cd\u4f5c\u5458 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u59d3\u540d <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u63cf\u8ff0 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4f8b\u5b50 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u8f93\u51fa<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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+<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6dfb\u52a0<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u7684\u603b\u548c<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1 + 1;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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2<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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–<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u51cf\u6cd5<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u4e4b\u95f4\u7684\u5dee\u5f02<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1 – 1;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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0<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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*<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4e58\u6cd5<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5c06<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u76f8\u4e58<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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3 * 7;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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21<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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\/<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5206\u914d<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u7684\u5546<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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45 \/ 5;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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9<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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%<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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PHP <\/span><\/span><\/span><\/span>\u6a21\u6570<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u7ed9\u51fa\u9664<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u7684\u4f59\u6570<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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10% 3<\/span><\/span><\/span><\/span>\uff1b<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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-n<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5426\u5b9a<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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n <\/span><\/span><\/span><\/span>\u53d8\u4e3a\u8d1f\u6570<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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-(-5);<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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5<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X .Y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u7ea7\u8054<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5c06<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u653e\u5728\u4e00\u8d77<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u201c<\/span><\/span><\/span><\/span>PHP<\/span><\/span><\/span><\/span>\u201d\u3002\u201c\u5ca9\u77f3\u201d\uff1b<\/span><\/span><\/span><\/span>10<\/span><\/span><\/span><\/span>\u3002<\/span><\/span><\/span><\/span>3<\/span><\/span><\/span><\/span>\uff1b<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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PHP ROCKS103<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8d4b\u503c\u8fd0\u7b97\u7b26<\/p>\n

\u8d4b\u503c\u8fd0\u7b97\u7b26\u7528\u4e8e\u4e3a\u53d8\u91cf\u8d4b\u503c\u3002\u5b83\u4eec\u4e5f\u53ef\u4ee5\u4e0e\u7b97\u672f\u8fd0\u7b97\u7b26\u4e00\u8d77\u4f7f\u7528\u3002<\/p>\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
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\u64cd\u4f5c\u5458 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u59d3\u540d <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u63cf\u8ff0 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4f8b\u5b50 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u8f93\u51fa<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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x = ?<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4efb\u52a1<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5c06<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u7684\u503c\u5206\u914d\u7ed9<\/span><\/span><\/span><\/span>?<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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$x = 5;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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5<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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x += ?<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6dfb\u52a0<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5c06<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u7684\u503c\u589e\u52a0<\/span><\/span><\/span><\/span>?<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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$x = 2;$x += 1;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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3<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X -= ?<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u51cf\u6cd5<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u51cf\u6cd5\uff1f\u4ece <\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u7684\u503c<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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$x = 3;$x -= 2;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X *=<\/span><\/span><\/span><\/span>\uff1f<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4e58\u6cd5<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4e58\u4ee5 <\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u7684\u503c\uff1f\u6b21<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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$x = 0;$x *=9;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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0<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X \/=<\/span><\/span><\/span><\/span>\uff1f<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5206\u914d<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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x <\/span><\/span><\/span><\/span>\u548c \u7684\u5546\uff1f<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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$x = 6;$x \/=3;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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2<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X %=?<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6a21\u91cf<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u9664\u4ee5 <\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u7684\u63d0\u793a\uff1f<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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$x = 3;$x %= 2;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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=?<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u8fde\u63a5<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5c06\u7269\u54c1\u653e\u5728\u4e00\u8d77<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u201c$x = ‘<\/span><\/span><\/span><\/span>\u6f02\u4eae<\/span><\/span><\/span><\/span>‘;$x .= ‘<\/span><\/span><\/span><\/span>\u9177\uff01<\/span><\/span><\/span><\/span>‘;<\/span><\/span><\/span><\/span>\u201d<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5f88\u9177\uff01<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/p>\n

\u6bd4\u8f83\u8fd0\u7b97\u7b26\u7528\u4e8e\u6bd4\u8f83\u503c\u548c\u6570\u636e\u7c7b\u578b\u3002\u63a8\u8350\u9605\u8bfb\uff1a\u300a WordPress \u548c PHP8 \u517c\u5bb9\u6027\u6311\u6218 \u300b<\/a><\/p>\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
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\u64cd\u4f5c\u5458 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u59d3\u540d <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u63cf\u8ff0 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4f8b\u5b50 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u8f93\u51fa<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X == y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5e73\u7b49\u7684<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6bd4\u8f83<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y<\/span><\/span><\/span><\/span>\uff0c\u5982\u679c\u76f8\u7b49\u5219\u8fd4\u56de<\/span><\/span><\/span><\/span>true<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1 == <\/span><\/span><\/span><\/span>\u201c<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span>\u201d\uff1b<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u771f\u6216 <\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X === y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5b8c\u5168\u76f8\u540c\u7684<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6bd4\u8f83\u503c\u548c\u6570\u636e\u7c7b\u578b\u3002<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1 === <\/span><\/span><\/span><\/span>\u201c<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span>\u201d\uff1b<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5047\u6216<\/span><\/span><\/span><\/span>0<\/span><\/span><\/span><\/span>\u3002\u56e0\u4e3a<\/span><\/span><\/span><\/span>1 <\/span><\/span><\/span><\/span>\u662f\u6574\u6570\uff0c\u201c<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span>\u201d\u662f\u5b57\u7b26\u4e32<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X != y, x <> y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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PHP <\/span><\/span><\/span><\/span>\u4e0d\u7b49\u4e8e<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6bd4\u8f83<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u7684\u503c\u3002\u5982\u679c\u503c\u4e0d\u76f8\u7b49\uff0c\u5219\u8fd4\u56de <\/span><\/span><\/span><\/span>true<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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2 != 1;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u771f\u6216<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X > yX > y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6bd4<\/span><\/span><\/span><\/span>…<\/span><\/span><\/span><\/span>\u66f4\u68d2<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6bd4\u8f83<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u7684\u503c\u3002\u5982\u679c <\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u5927\u4e8e <\/span><\/span><\/span><\/span>y<\/span><\/span><\/span><\/span>\uff0c\u5219\u8fd4\u56de <\/span><\/span><\/span><\/span>true<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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3 > 1;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u771f\u6216<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X < y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5c11\u4e8e<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6bd4\u8f83<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u7684\u503c\u3002\u5982\u679c <\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u5c0f\u4e8e <\/span><\/span><\/span><\/span>y<\/span><\/span><\/span><\/span>\uff0c\u5219\u8fd4\u56de <\/span><\/span><\/span><\/span>true<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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2 < 1;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5047\u6216<\/span><\/span><\/span><\/span>0<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X >= y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5927\u4e8e\u6216\u7b49\u4e8e<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6bd4\u8f83<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u7684\u503c\u3002\u5982\u679c <\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u5927\u4e8e\u6216\u7b49\u4e8e <\/span><\/span><\/span><\/span>y<\/span><\/span><\/span><\/span>\uff0c\u5219\u8fd4\u56de <\/span><\/span><\/span><\/span>true<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1 >=1<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u771f\u6216<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X <= y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5c0f\u4e8e\u6216\u7b49\u4e8e<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6bd4\u8f83<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u7684\u503c\u3002\u5982\u679c <\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u5927\u4e8e\u6216\u7b49\u4e8e <\/span><\/span><\/span><\/span>y<\/span><\/span><\/span><\/span>\uff0c\u5219\u8fd4\u56de <\/span><\/span><\/span><\/span>true<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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8 <= 6<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5047\u6216<\/span><\/span><\/span><\/span>0<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u903b\u8f91\u8fd0\u7b97\u7b26<\/p>\n

\u4f7f\u7528\u903b\u8f91\u8fd0\u7b97\u7b26\u65f6\uff0c\u4efb\u4f55\u5927\u4e8e\u6216\u5c0f\u4e8e\u96f6 (0) \u7684\u6570\u5b57\u90fd\u4f1a\u8ba1\u7b97\u4e3a\u771f\u3002\u96f6 (0) \u8bc4\u4f30\u4e3a\u5047\u3002<\/p>\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
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\u64cd\u4f5c\u5458 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u59d3\u540d <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u63cf\u8ff0 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4f8b\u5b50 <\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u8f93\u51fa<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y<\/span><\/span><\/span><\/span>\uff0c<\/span><\/span><\/span><\/span>x && y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u548c<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5982\u679c<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u76f8\u7b49\uff0c\u5219\u8fd4\u56de<\/span><\/span><\/span><\/span>true<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1<\/span><\/span><\/span><\/span>\u548c<\/span><\/span><\/span><\/span>4;<\/span><\/span><\/span><\/span>\u771f<\/span><\/span><\/span><\/span>&&<\/span><\/span><\/span><\/span>\u5047<\/span><\/span><\/span><\/span>;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u771f\u6216<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span>\u5047\u6216<\/span><\/span><\/span><\/span>0<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X <\/span><\/span><\/span><\/span>\u6216<\/span><\/span><\/span><\/span>y, x || <\/span><\/span><\/span><\/span>\u662f\u7684<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u6216\u8005<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5982\u679c<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u6216<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u4e3a\u771f\uff0c\u5219\u8fd4\u56de\u771f<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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6 <\/span><\/span><\/span><\/span>\u6216 <\/span><\/span><\/span><\/span>9;0 || 0;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u771f\u6216<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span>\u5047\u6216<\/span><\/span><\/span><\/span>0<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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X xor y<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5f02\u6216\uff0c\u5f02\u6216<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5982\u679c\u53ea\u6709<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u4e3a\u771f\u6216\u53ea\u6709<\/span><\/span><\/span><\/span>y <\/span><\/span><\/span><\/span>\u4e3a\u771f\uff0c\u5219\u8fd4\u56de\u771f<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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1 <\/span><\/span><\/span><\/span>\u5f02\u6216<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span>\uff1b<\/span><\/span><\/span><\/span>1 <\/span><\/span><\/span><\/span>\u5f02\u6216<\/span><\/span><\/span><\/span>0<\/span><\/span><\/span><\/span>\uff1b<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5047\u6216<\/span><\/span><\/span><\/span>0<\/span><\/span><\/span><\/span>\u771f\u6216<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n

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\uff01<\/span><\/span><\/span><\/span>X<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u4e0d\u662f<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u5982\u679c<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u4e3a\u5047\uff0c\u5219\u8fd4\u56de\u771f\uff0c\u5982\u679c<\/span><\/span><\/span><\/span>x <\/span><\/span><\/span><\/span>\u4e3a\u771f\uff0c\u5219\u8fd4\u56de\u5047<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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!0;<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n

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\u771f\u6216<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6982\u62ec<\/p>\n

PHP \u662f\u4e00\u79cd\u677e\u6563\u7c7b\u578b\u7684\u8bed\u8a00\u3002<\/p>\n

\u53d8\u91cf\u662f\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u7684\u5185\u5b58\u4f4d\u7f6e<\/p>\n

\u5e38\u91cf\u7684\u503c\u4e0d\u80fd\u5728\u8fd0\u884c\u65f6\u6539\u53d8<\/p>\n

\u7c7b\u578b\u8f6c\u6362\u7528\u4e8e\u5c06\u503c\u6216\u53d8\u91cf\u8f6c\u6362\u4e3a\u6240\u9700\u7684\u6570\u636e\u7c7b\u578b<\/p>\n

\u7b97\u672f\u8fd0\u7b97\u7b26\u7528\u4e8e\u64cd\u4f5c\u6570\u503c\u6570\u636e<\/p>\n

\u8d4b\u503c\u8fd0\u7b97\u7b26\u7528\u4e8e\u5c06\u6570\u636e\u5206\u914d\u7ed9\u53d8\u91cf<\/p>\n

\u6bd4\u8f83\u8fd0\u7b97\u7b26\u7528\u4e8e\u6bd4\u8f83\u53d8\u91cf\u6216\u503c<\/p>\n

\u903b\u8f91\u8fd0\u7b97\u7b26\u7528\u4e8e\u6bd4\u8f83\u6761\u4ef6\u6216\u503c\u3002\u63a8\u8350\u76f8\u5173\u9605\u8bfb\uff1a\u300a\u600e\u6837\u9009\u62e9\u4e00\u4e2a\u6bd4\u8f83\u597d\u7528\u7684PHP\u865a\u62df\u4e3b\u673a\u7a7a\u95f4\u300b<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

hostease\u7f8e\u56fd\u670d\u52a1\u5668\u5546\u5206\u4eabPHP\u5e38\u91cf\u3001\u8fd0\u7b97\u7b26\u6559\u7a0b PHP \u5e38\u91cf \u5b9a\u4e49\u5e38\u91cf\u2014\u2014\u5e38\u91cf\u662f\u4e00\u4e2a\u53d8\u91cf\uff0c\u5176\u503c\u5728\u8fd0\u884c\u65f6\u4e0d\u80fd\u66f4\u6539\u3002 \u5047\u8bbe\u6211\u4eec\u6b63\u5728\u5f00\u53d1\u4e00\u4e2a\u4f7f\u7528 PI 3.14 \u503c\u7684\u7a0b\u5e8f\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5e38\u91cf\u6765\u5b58\u50a8\u5b83\u7684\u503c\u3002\u63a8\u8350\u9605\u8bfb\uff1a\u300a \u4ec0\u4e48\u662fPHP? \u300b \u73b0\u5728\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u5b9a\u4e49\u5e38\u91cf\u7684\u793a\u4f8b\u3002\u5b9a\u4e49(‘PI’\uff0c3.14);\/\/\u521b\u5efa\u4e00 …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[384,385,277],"class_list":{"0":"post-2147","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-server","7":"tag-php","9":"tag-277"},"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/2147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/comments?post=2147"}],"version-history":[{"count":2,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/2147\/revisions"}],"predecessor-version":[{"id":22799,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/2147\/revisions\/22799"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media?parent=2147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/categories?post=2147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/tags?post=2147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}