根据重复值排序PHP数组 [英] Ordering PHP arrays based on duplicate values

问题描述

我有一个包含重复值的数组.我想对数组进行排序，以使重复次数最多的值排在第一位.这是我的数组的示例:

I have an array which contains duplicate values. I want to sort the array so that the values with the most duplicates appear first in line. Here's an example of my array:

array(1, 2, 3, 2, 1, 2, 2);

我想对该数组进行排序，以便根据重复量将其自身排序为以下内容:

I want to sort this array so that it orders itself based on the amount of duplicates into the following:

array(2, 1, 3);

'2'具有最多的重复项，因此其排在第一位，其次是值，将减少重复项.有人知道我该怎么做吗?

'2' has the most duplicates so it's sorted first, followed by values will less duplicates. Does anyone know how I can accomplish this?

推荐答案

 $acv=array_count_values($array); //  1=>2, 2=>3,3=>1
 arsort($acv); //save keys,           2=>3, 1=>2, 3=>1 
 $result=array_keys($acv); //get only keys   2,1,3

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