生成单词组合

|| 例如，这是我的文字：

$str = \'buy new microsoft windows\';

我用数组爆炸文本和列表：

Array
(
    [0] => buy
    [1] => new
    [2] => microsoft
    [3] => windows
)

我想生成数组中的单词，像这样：

buy new
buy new windows
buy microsoft 
buy microsoft windows
buy windows
new microsoft
new microsoft windows
new windows
microsoft windows

我尝试使用foreach和rand，但无法生成显示的图像。有没有机会像我的要求那样生成？

已邀请:

5 个回复

誓猎贰

你可以看看这个梨包装用法示例：

<?php
require_once \'Math/Combinatorics.php\';
$words = array(\'buy\', \'new\', \'microsoft\');
$combinatorics = new Math_Combinatorics;
foreach($combinatorics->permutations($words, 2) as $p) {
  echo join(\' \', $p), \"\\n\"; 
}

输出将是：

buy new
new buy
buy microsoft
microsoft buy
new microsoft
microsoft new

慷祈霖黑

shuffle($array);
echo join(\' \', array_slice($array, 0, mt_rand(1, count($array))));

这给了您一个随机的“句子”。根据需要重复。

到街客核

函数pc_permute（$ items，$ perms = array（））{ 如果（空（$ items））{ 打印join（\'\'，$ perms）。 \“ \\ n \”; }其他{ 对于（$ i = count（$ items）-1; $ i> = 0;-$ i）{ $ newitems = $ items; $ newperms = $ perms; list（$ foo）= array_splice（$ newitems，$ i，1）; array_unshift（$ newperms，$ foo）; pc_permute（$ newitems，$ newperms）; } } } 来源：http://docstore.mik.ua/orelly/webprog/pcook/ch04_26.htm#phpckbk-CHP-4-EX-6 还要检查该网站上的下一个示例例如：pc_permute( explode( \' \', \'buy new microsoft windows\' ) ); 购买新的Microsoft Windows 新购买Microsoft Windows 购买Microsoft新视窗微软购买新视窗新的Microsoft购买Windows 微软新购买Windows 购买新的Windows微软新购买的Windows微软购买Windows新版Microsoft Windows购买新的微软新窗口购买微软 Windows新购买微软购买新的Microsoft Windows 微软购买新的Windows 购买Windows Microsoft新 Windows购买微软新 Microsoft Windows购买新 Windows Microsoft购买新新的Microsoft Windows购买微软新视窗购买新视窗Microsoft购买 Windows新微软购买 Microsoft Windows新购买 Windows Microsoft新购买

荆怖赡

从php.net shuffle doc找到

function powerSet($in,$minLength = 1) { 
   $count = count($in); 
   $members = pow(2,$count); 
   $return = array(); 
   for ($i = 0; $i < $members; $i++) { 
      $b = sprintf(\"%0\".$count.\"b\",$i); 
      $out = array(); 
      for ($j = 0; $j < $count; $j++) { 
         if ($b{$j} == \'1\') $out[] = $in[$j]; 
      }
      $out_val = implode(\" \", $out); 
      if (count($out) >= $minLength) { 
         $return[] = $out_val; 
      } 
   } 
   return $return; 
}

print_r(powerSet($str_arr));

结果是

Array
(
    [0] => windows
    [1] => microsoft
    [2] => microsoft windows
    [3] => new
    [4] => new windows
    [5] => new microsoft
    [6] => new microsoft windows
    [7] => buy
    [8] => buy windows
    [9] => buy microsoft
    [10] => buy microsoft windows
    [11] => buy new
    [12] => buy new windows
    [13] => buy new microsoft
    [14] => buy new microsoft windows
)

薄扩络拜

对于所有可能的组合，我都改进了@SujitAgarwal答案：下载Math_Combinatoeics。

include_once \'Combinatorics.php\';

$words = array(\'buy\',\'microsoft\',\'windows\');
$count = count($words);
$return = array();

$combinatorics = new Math_Combinatorics;

for ($num=1; $num <= $count; $num++ ){
  foreach($combinatorics->permutations($words, $num) as $p) {
    $return[] = join(\' \', $p);
  }
} 

print_r($return);

输出：

Array
(
  [0] => buy
  [1] => microsoft
  [2] => windows
  [3] => buy microsoft
  [4] => microsoft buy
  [5] => buy windows
  [6] => windows buy
  [7] => microsoft windows
  [8] => windows microsoft
  [9] => buy microsoft windows
  [10] => buy windows microsoft
  [11] => microsoft windows buy
  [12] => microsoft buy windows
  [13] => windows buy microsoft
  [14] => windows microsoft buy
)

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生成单词组合

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生成单词组合

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