luojixinhao / pac
域名生成,排列组合,permutation and combination
V1.0
2017-09-14 09:22 UTC
Requires
- php: >=5.3.0
- ext-curl: *
This package is not auto-updated.
Last update: 2024-04-14 01:30:56 UTC
README
用于遍历字符串组合,传统方式慢,内存占用高,使用该库能快速定位和遍历各种组合。 可用于生成域名等
需求
PHP 5.3 +
安装
composer require luojixinhao/pac:*
联系
Email: lx_2010@qq.com
示例
/*纯数字的组合*/ $pac = new \luojixinhao\pac\pac('0123456789'); //获取长度1的组合总数(其实就是0,1,2,3,4,5,6,7,8,9这10个数的总数) echo $pac->getCount(1); //==返回10 //获取长度2的组合总数(其实就是00,01,02,....98,99这100个数的总数) echo $pac->getCount(2, false); //==返回100 echo $pac->getCount(2); //==返回110 (包含了长度1的总数) //获取长度3的组合总数(其实就是000,001,002,....998,999这1000个数的总数) echo $pac->getCount(3, false); //==返回1000 echo $pac->getCount(3); //==返回1110 (包含了长度1和长度2的总数) //获取组合长度为1,排在第5位置的数字 echo $pac->get(5, 1); //==返回5 //获取组合长度为2,排在第5位置的数字 echo $pac->get(5, 2); //==返回5 echo $pac->get(5, 2, false); //==返回05 //获取组合长度为2,各种返回值 for ($i = 0; $i < 110; $i++) { echo '<br>'; echo $pac->get($i, 2, true, true); echo ' | '; echo $pac->get($i, 2, false, true); echo ' | '; echo $pac->get($i, 2, true, false); echo ' | '; echo $pac->get($i, 2, false, false); } //==返回 //0 | 00 | 0 | 10 //1 | 01 | 1 | 11 //2 | 02 | 2 | 12 //3 | 03 | 3 | 13 //4 | 04 | 4 | 14 //5 | 05 | 5 | 15 //6 | 06 | 6 | 16 //7 | 07 | 7 | 17 //8 | 08 | 8 | 18 //9 | 09 | 9 | 19 //00 | 10 | 10 | 20 //01 | 11 | 11 | 21 // ...... //78 | 88 | 88 | 98 //79 | 89 | 89 | 99 //80 | 90 | 90 | {end} //81 | 91 | 91 | {end} //82 | 92 | 92 | {end} //83 | 93 | 93 | {end} //84 | 94 | 94 | {end} //85 | 95 | 95 | {end} //86 | 96 | 96 | {end} //87 | 97 | 97 | {end} //88 | 98 | 98 | {end} //89 | 99 | 99 | {end} //90 | {end} | {end} | {end} //91 | {end} | {end} | {end} //92 | {end} | {end} | {end} //93 | {end} | {end} | {end} //94 | {end} | {end} | {end} //95 | {end} | {end} | {end} //96 | {end} | {end} | {end} //97 | {end} | {end} | {end} //98 | {end} | {end} | {end} //99 | {end} | {end} | {end} /*纯字母的组合*/ $pac = new pac('abcdefghijklmnopqrstuvwxyz'); //获取组合总数 echo $pac->getCount(1); //==返回26 echo $pac->getCount(2); //==返回702 echo $pac->getCount(3); //==返回18278 echo $pac->getCount(4); //==返回475254 //获取组合长度为2,各种返回值 for ($i = 0; $i < 702; $i++) { echo '<br>'; echo $pac->get($i, 2, true, true); echo ' | '; echo $pac->get($i, 2, false, true); echo ' | '; echo $pac->get($i, 2, true, false); echo ' | '; echo $pac->get($i, 2, false, false); } //==返回 //a | aa | a | ba //b | ab | b | bb //c | ac | c | bc //d | ad | d | bd //e | ae | e | be //f | af | f | bf // ...... //xx | yx | yx | zx //xy | yy | yy | zy //xz | yz | yz | zz //ya | za | za | {end} //yb | zb | zb | {end} // ...... //yx | zx | zx | {end} //yy | zy | zy | {end} //yz | zz | zz | {end} //za | {end} | {end} | {end} //zb | {end} | {end} | {end} //zc | {end} | {end} | {end} // ...... //zy | {end} | {end} | {end} //zz | {end} | {end} | {end} /*自定义的组合*/ $pac = new pac(['sun', 'moon', 'star', 'earth']); //获取组合总数 echo $pac->getCount(1); //==返回4 echo $pac->getCount(2); //==返回20 echo $pac->getCount(3); //==返回84 echo $pac->getCount(4); //==返回340 //获取组合长度为3,各种返回值 for ($i = 0; $i < 84; $i++) { echo '<br>'; echo $pac->get($i, 3, true, true); echo ' | '; echo $pac->get($i, 3, false, true); echo ' | '; echo $pac->get($i, 3, true, false); echo ' | '; echo $pac->get($i, 3, false, false); } //==返回 //sun | sunsunsun | sun | moonmoonsun //moon | sunsunmoon | moon | moonmoonmoon //star | sunsunstar | star | moonmoonstar //earth | sunsunearth | earth | moonmoonearth //sunsun | sunmoonsun | moonsun | moonstarsun //sunmoon | sunmoonmoon | moonmoon | moonstarmoon // ...... //moonmoonearth | starstarearth | starstarearth | earthearthearth //moonstarsun | starearthsun | starearthsun | {end} // ...... //starstarearth | earthearthearth | earthearthearth | {end} //starearthsun | {end} | {end} | {end} // ...... //earthearthearth | {end} | {end} | {end}