计算特定值在数组中出现的频率 [英] Count how often a particular value appears in an array

问题描述

我知道php，
的函数 count（），但是计算一个值出现在数组中的频率是多少？

示例：

  $ array = array（
 [0] => ;'Test'，
 [1] =>'教程'，
 [2] =>'视频'，
 [3] =>'测试'，
 [4] =>'Test'
）; 
  

现在我想计算Test出现的频率。

< PHP有一个名为

例如：

$ b $ p
$ b

 <？php 
 $ array = array（1，hello，1，world，hello）; 
 print_r（array_count_values（$ array））; 
？> 
  

输出：

 code> Array 
（
 [1] => 2 
 [hello] => 2 
 [world] => 1 
）
  

I know the function count() of php, but what's the function for counting how often a value appear in an array?

Example:

$array = array(
  [0] => 'Test',
  [1] => 'Tutorial',
  [2] => 'Video',
  [3] => 'Test',
  [4] => 'Test'
);

Now I want to count how often "Test" appears.

解决方案

PHP has a function called array_count_values for that.

Example:

<?php
$array = array(1, "hello", 1, "world", "hello");
print_r(array_count_values($array));
?>

Output:

Array
(
    [1] => 2
    [hello] => 2
    [world] => 1
)

这篇关于计算特定值在数组中出现的频率的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！