获得所有可能的组合而无重复

本文介绍了获得所有可能的组合而无重复的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如何获得给定数字的所有可能组合。 例如，我有

How can I get all the possible combinations of given numbers. For instance I have

$ arr = [1，2，3，4]

我想获取组合内没有任何重复的组合

I want to get the combinations without any duplicates inside the combinations

[1] => [1] [2] => [2] [3] => [3] [4] => [4] [5] => [1, 2] [6] => [1, 3] [7] => [1, 4] [8] => [2, 3] [9] => [2, 4] [10] => [3, 4] [11] => [1, 2, 3] [12] => [1, 2, 4] [13] => [1, 3, 4] [14] => [2, 3, 4] [15] => [1, 2, 3, 4]

推荐答案

我希望下面的函数按照您的预期输出工作：

I hope below function work as per your expected output :

function get_array_combination($arr) { $results = array(array( )); foreach ($arr as $values) foreach ($results as $combination) array_push($results, array_merge($combination, array($values))); // Get new values and merge to your previous combination. And push it to your results array return $results; } $set = array('1', '2', '3', '4'); $final_array = get_array_combination($set); echo "<pre>"; print_r(array_values(array_filter($final_array))); // Removed blank entry from array and re indexing array keys.