PHP多维数组数 [英] PHP Multidimensional Array Count

问题描述

我有以下的数组，我要算PaymentType==贝宝的元素。我用这个方法
$ TOTALCOUNT = 计数（array_filter（（阵列）$ DATA [0]，'贝宝'））;
但得到警告贝宝，应该是一个有效的回调
鸭preciate任何回应，以帮助我得到正确的方向前进。

 阵列
（
[0] =＆GT;排列
    （
        [TransactionDate] =＆GT; 0000-00-00 00:00:00
        [总金额] =＆GT; 0.00
        [PayPalFee] =＆GT; 2.48
        [PayPalTransactionID] =＆GT; 92
        [PaymentType] =＆GT;贝宝
    ）[1] =＆GT;排列
    （
        [TransactionDate] =＆GT; 0000-00-00 00:00:00
        [总金额] =＆GT; 0.00
        [PayPalFee] =＆GT; 2.48
        [PayPalTransactionID] =＆GT; 3
        [PaymentType] =＆GT;贝宝
    ）[2] =＆GT;排列
    （
        [TransactionDate] =＆GT; 2011-05-16 11点15分02秒
        [总金额] =＆GT; 75.00
        [PayPalFee] =＆GT; 2.48
        [PayPalTransactionID] =＆GT; 2
        [PaymentType] =＆GT;贝宝
    ）
）
 

解决方案

array_filter（）应该返回滤波阵列（也需要一个回调函数来工作，不是搜索值） - 你不需要这么做。这里是真正只计算匹配的解决方案：

  $ TOTALCOUNT = 0;
为（$ i = 0，$ C =计数（$数据[0]）; $ I＆LT; $ C，$ I ++）
{
    如果（$数据[0] [$ i] ['PaymentType'] ===贝宝）
        $ TOTALCOUNT ++;
}
 

I have the following array that I want to count the element of "PaymentType" == paypal. I am using this method $totalcount = count(array_filter((array) $data[0], 'paypal')); but get the warning "'paypal', should be a valid callback" Appreciate any response to help me get going in the right direction.

Array
(
[0] => Array
    (
        [TransactionDate] => 0000-00-00 00:00:00
        [TotalAmount] => 0.00
        [PayPalFee] => 2.48
        [PayPalTransactionID] => 92
        [PaymentType] => paypal
    )

[1] => Array
    (
        [TransactionDate] => 0000-00-00 00:00:00
        [TotalAmount] => 0.00
        [PayPalFee] => 2.48
        [PayPalTransactionID] => 3
        [PaymentType] => paypal
    )

[2] => Array
    (
        [TransactionDate] => 2011-05-16 11:15:02
        [TotalAmount] => 75.00
        [PayPalFee] => 2.48
        [PayPalTransactionID] => 2
        [PaymentType] => paypal
    )
)

解决方案

array_filter() is supposed to return a filtered array (and also needs a callback function to work, not a search value) - you don't need to do that. Here's a solution that really only counts the matches:

$totalcount = 0;
for ($i = 0, $c = count($data[0]); $i < $c; $i++)
{
    if ($data[0][$i]['PaymentType'] === 'paypal')
        $totalcount++;
}

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