PHP从数组获取多个最大值 [英] PHP Get multiple highest values from array

问题描述

我有一个脚本，该脚本将一堆变量(在这种情况下为随机字母A到D)放入数组中，计算这些变量的频率，找到最高频率，然后找到与该频率匹配的键.

I have a script that puts a bunch of variables (in this case random letters A through D) into an array, counts the frequency of these variables, finds the highest frequency and then finds the key that matches this frequency.

$answerlist = array($a1, $a2, $a3, $a4,);
$count = array_count_values($answerlist);
$high_value = max($count);
$high_key = array_search($high_value, $count); 
print_r ($high_key);

但是，在存在2个相等的最大值的情况下，array_search仅返回第一个键.有办法将两者都退还吗?

However in a case where there are 2 equal highest values, array_search only returns the first key. Is there a way to return both?

推荐答案

这应该做到:

$high_keys = array_keys($count, $high_value);

来自 文档:

如果在干草堆中多次发现needle，则返回第一个匹配键.要返回所有匹配值的键，请使用array_keys()和可选的search_value参数.

If needle is found in haystack more than once, the first matching key is returned. To return the keys for all matching values, use array_keys() with the optional search_value parameter instead.

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