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