php - 计算 PHP 数组中的出现次数

Question

我正在玩 opencart 并尝试向购物车的过滤器功能添加一些新功能。

我想知道如何有效地计算多维 php 数组中给定值的出现次数？例如，我正在尝试使用我们的 if all Filter->Count == 0?

Array
    (
    ...
    [filter] => Array
       (
       [0] => Array
       (
          [filter_id] => 109
          [name] => Boyfriends (0)
          [count] => 0
       )

       [1] => Array
       (
          [filter_id] => 114
          [name] => Daughters (0)
          [count] => 0
       )

       [2] => Array
       (
          [filter_id] => 115
          [name] => Fathers (0)
          [count] => 0
       )

       [3] => Array
       (
          [filter_id] => 108
          [name] => For Her (53)
          [count] => 53
       )
    ...
    )
...
)

Answer 1

$amount = 0;
foreach($array as $value) {
    if($value['count'] == 0)
        $amount++;
}

这将返回等于零的“计数”数量。要返回不为 0 的金额，请使用以下命令：

$amount = 0;
foreach($array as $value) {
    if($value['count'] != 0)
        $amount++;
}

如果所有 'count' 值都为零，则 then$amount将等于零。