PHP - 计算二维数组中的重复值，然后仅显示带有计数的唯一值 [英] PHP - Count duplicate values within two dimensional array, then display only unique values with the count

问题描述

我已经为此工作了几天......但仍然无法达到我想要的结果.对此有任何帮助将不胜感激...在此先感谢您.

我在 $log 中存储了一个多数组，当您打印_r($log) 时显示如下:

 Array ( [0] => Array ( [0] => Red [1] => Steel )[1] =>阵列( [0] => 红色 [1] => 木头)[2] =>阵列( [0] => 蓝色 [1] => 木头))

目前我有这个:

$counts = $log;foreach ($log as $value) {foreach ($value as $k => $v) {if (!isset($counts[$k])) $counts[$k] = array();如果 (!isset($counts[$k][$v])) $counts[$k][$v] = 0;$counts[$k][$v] += 1;}}foreach ($counts as $k => $v1) {foreach ($v1 as $v => $count) {echo "$v => $count 
";}}

显示:

0 =>红色的1 =>钢红色 =>2蓝色 =>10 =>红色的1 =>木头钢 =>1木材 =>20 =>蓝色1 =>木头

但我真的希望得到以下结果:

颜色
红色 =>2蓝色 =>1<h2>材料</h2>钢 =>1木材 =>2

解决方案

如果你使用的是 PHP >= 5.5，你可以使用 array_column()，结合 array_count_values():

$colors = array_count_values(array_column($log, 0));$materials = array_count_values(array_column($log, 1));

查看演示

<小时>

或者，如果您不使用 PHP >= 5.5，这将适用于 PHP 4, 5:

$colors = $materials = array();foreach ($log as $a){$colors[] = $a[0];$材料[] = $a[1];}$colors = array_count_values($colors);$materials = array_count_values($materials);

查看演示 2

<小时>

单击此处查看适用于任一方法的示例用例.

I've been working on this for a couple days now... and still haven't been able to achieve my desired results. Any help would on this would be greatly appreciated... thank you in advance.

I have a multi-array stored in $log, which displays like this when you print_r($log):

   Array ( [0] => Array ( [0] => Red [1] => Steel ) 
           [1] => Array ( [0] => Red [1] => Wood ) 
           [2] => Array ( [0] => Blue [1] => Wood ) 
         )

Currently I have this:

$counts = $log;
foreach ($log as $value) {
    foreach ($value as $k  => $v) {
        if (!isset($counts[$k])) $counts[$k] = array();
        if (!isset($counts[$k][$v])) $counts[$k][$v] = 0;
        $counts[$k][$v] += 1;
    }
}

foreach ($counts as $k => $v1) {
    foreach ($v1 as $v => $count) {
        echo "$v => $count <br />";
    }
}

Which Displays:

0 => Red 
1 => Steel 
Red => 2 
Blue => 1 
0 => Red 
1 => Wood 
Steel => 1 
Wood => 2 
0 => Blue 
1 => Wood  

But I'm really looking to have an end result of:

<h2>Colors</h2>
Red => 2
Blue => 1

<h2>Materials</h2>
Steel => 1
Wood => 2

解决方案

If you are using PHP >= 5.5, you can use array_column(), in conjunction with array_count_values():

$colors = array_count_values(array_column($log, 0));
$materials = array_count_values(array_column($log, 1));

See demo

---

Or, if you're not using PHP >= 5.5, this will work in PHP 4, 5:

$colors = $materials = array();
foreach ($log as $a){
    $colors[] = $a[0];
    $materials[] = $a[1];
}

$colors = array_count_values($colors);
$materials = array_count_values($materials);

See demo 2

---

Click here for sample use case that will work with either method.

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